Portable tool for testing air tightness of underwater vehicle

Abstract

The utility model discloses a portable tool for testing the air tightness of an underwater vehicle, which belongs to the technical field of underwater equipment testing and comprises a sealing capsule and a sealing end cover assembly, a pressurizing cavity for arranging the underwater vehicle is formed in the sealing capsule, the sealing end cover assembly is mounted in the sealing capsule, and the pressurizing cavity is communicated with the pressurizing cavity. The sealing end cover assembly in an open state forms an opening of the pressurizing cavity, and the sealing capsule is communicated with a pressurizing pump. The portable air tightness testing tool has the advantages of being simple in structure, low in cost, high in portability, convenient to operate, rapid in detection and the like, an efficient, economical and practical solution is provided for air tightness detection of the underwater vehicle, and the portable air tightness testing tool is particularly suitable for ocean operation and emergency troubleshooting scenes.

Description

TECHNICAL FIELD

[0001] The utility model belongs to underwater equipment test technical field especially relates to a portable tool for underwater vehicle airtightness test. BACKGROUND

[0002] The underwater glider is an important member of the unmanned underwater vehicle equipment system, relies on adjusting buoyancy to realize heaving, and realizes gliding in water by means of water power. The novel underwater robot has the characteristics of small size, low power consumption, slow speed, long range, long endurance time, high autonomy, low manufacturing and maintenance cost, etc., and can meet the needs of long-time, large-range, three-dimensional continuous ocean exploration. Before the underwater glider is formally launched into use, the cabin needs to be pumped to a specified negative pressure to ensure that the back oil discharge function of the buoyancy system is normal. After reaching the predetermined negative pressure, the pressure environment under the maximum diving depth needs to be simulated in the pressure tank to test the overall sealing property of the glider, and the glider can be put into use only after it is ensured that the requirements are met. In the actual diving process, the cabin pressure is mainly affected by the back oil discharge of the back buoyancy system and the temperature change, and the influence of these factors on the cabin pressure has certain regularity, which can be summarized and controlled during the equipment debugging stage. In addition, if the cabin pressure changes abnormally during diving, it may be caused by insufficient airtightness, and whether there is leakage needs to be confirmed through further pressure maintaining experiment.

[0003] At present, the air tightness test of underwater vehicles has many shortcomings and deficiencies in practical application, mainly in the following aspects: first, the traditional pressure test usually relies on large equipment such as pressure tanks and cranes, and the test process often takes a long time, resulting in low overall detection efficiency. Secondly, after the underwater glider is formally put into use, if there is an abnormal cabin pressure change in the sea task, there is usually a lack of corresponding detection equipment such as pressure tanks on site, which cannot accurately judge the air tightness of the glider at the first time, and can only make preliminary evaluation through speculation or experience, which has certain uncertainty. In addition, due to the lack of instant detection means, once the glider has a suspected leakage problem, it needs to be transported back to the shore-based laboratory or maintenance base for further detection and confirmation, which is time-consuming and laborious and seriously affects the normal operation efficiency of the equipment, especially when performing long-haul, far-sea detection and other tasks, the return detection will significantly increase the operation cost and task risk. In addition, the existing pressure test method is limited in its application environment and cannot meet the demand of air tightness test anytime and anywhere, especially in bad sea conditions or emergency situations, it cannot respond quickly and handle it. In addition, the pressure test equipment is large in size, complex in operation and high in professional requirement, which depends on the skills and experience of the operators, limiting the flexibility and autonomy of on-site operation. In summary, the existing air tightness test of underwater vehicles has a series of problems such as strong equipment dependence, low detection efficiency, insufficient remote detection capability, high return cost, limited applicability and complex operation, which needs to be improved and optimized. Practical new type content

[0004] In view of the problems of strong equipment dependence, low detection efficiency, insufficient remote detection capability, high return cost, limited applicability and complex operation of the existing air tightness test of underwater vehicles, the utility model provides a portable tool for air tightness test of underwater vehicles.

[0005] The utility model is realized in this way, a portable tool for air tightness test of underwater vehicles, characterized by: including sealed capsule and sealing end cap assembly, the inside of sealed capsule forms the pressure chamber for setting underwater vehicle, sealing end cap assembly installs in sealed capsule, the opening of pressure chamber is formed in the open state of sealing end cap assembly, sealed capsule comes the pressure pump.

[0006] In the above technical scheme, preferably, the sealed capsule includes two capsule bodies, the capsule bodies are cylindrical and one end is open; the end cap assembly includes two sealing end caps connected to the open end of the capsule body, respectively, and the two sealing end caps are connected to form the sealed capsule.

[0007] In the above technical solution, preferably, the sealing end cap assembly includes a sealing flange, the open end of the bladder is fixedly connected between the sealing end cap and the sealing flange, and the sealing end cap and the sealing flange are connected by fasteners.

[0008] In the above technical solution, preferably, the sealing end cap assembly includes a sealing ring, and the two sealing end caps connected to the two bladders are connected to the sealing ring by fasteners.

[0009] Compared to existing technologies, the portable fixture for testing the airtightness of underwater vehicles provided by this invention has the advantages of simple structure and convenient operation. The fixture mainly consists of a sealing flexible bladder, a pressure gauge, and connecting and fixing components. Installation and disassembly can be completed simply by connecting bolts between the symmetrical structures on both sides and the central sealing ring, greatly reducing the difficulty of operation and enabling even non-professionals to quickly master it, meeting the needs of rapid testing in emergency situations.

[0010] Furthermore, this tooling is inexpensive and economical. Its sealing flexible bladder is made of PVC and polyester fiber cloth, which has low production costs, readily available materials, and a simple manufacturing process, thereby reducing the overall manufacturing and maintenance costs of the equipment and making it highly valuable for widespread application.

[0011] In terms of portability, the tooling occupies little space and is easy to carry. When not in use, the tooling can be folded and stored by deflating, making it small in size and light in weight, which is convenient to carry on board during ocean operations. It provides immediate testing support in marine or field environments, meeting the needs of conducting airtightness tests anytime and anywhere.

[0012] This tooling also features rapid response and timely detection. When an underwater vehicle experiences abnormal cabin pressure during a mission, this tooling can be deployed immediately. By injecting 2 bar of positive pressure into the sealed bladder and combining this with the changes in the pressure gauge readings, it can quickly determine whether the glider has a leakage problem, providing a scientific basis for subsequent decision-making and avoiding prolonged downtime and mission delays due to a lack of detection equipment.

[0013] In summary, the portable airtightness testing fixture of the present invention provides an efficient, economical, and practical solution for airtightness testing of underwater vehicles, thanks to its advantages of simple structure, low cost, high portability, convenient operation, and rapid testing. It is especially suitable for ocean operations and emergency troubleshooting scenarios. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 yes Figure 1 Enlarged view of part A. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0017] To address the problems of current underwater vehicle airtightness pressure testing methods, such as strong equipment dependence, low testing efficiency, insufficient remote testing capability, high return costs, limited applicability, and complex operation, this utility model provides a portable fixture for underwater vehicle airtightness testing. To further illustrate the structure of this utility model, a detailed description is provided below in conjunction with the accompanying drawings:

[0018] Please see Figure 1 and Figure 2 A portable tooling for testing the airtightness of underwater vehicles includes a sealing capsule and a sealing end cap assembly. The interior of the sealing capsule forms a pressurization chamber for the underwater vehicle. The sealing end cap assembly is installed on the sealing capsule, and when open, it forms an opening in the pressurization chamber, allowing the sealing capsule to connect to a pressurization pump. The sealing capsule includes two cylindrical capsules 1, each open at one end. The end cap assembly includes two sealing end caps 2, each connected to the open end of one capsule, forming the sealing capsule. The sealing end cap assembly includes a sealing flange 3, with the open end of one capsule fixedly connected between the sealing end cap and the sealing flange via fasteners. The sealing end cap assembly includes a sealing ring 4, which is connected to the two sealing end caps of the two capsules via fasteners.

[0019] Specifically, the bladder body is made of PVC and polyester fiber cloth, ensuring flexibility while preventing damage and leakage due to impact and wear during operation. The sealing flange is made of POM material, meeting the strength requirements of the tooling while reducing the weight of the materials themselves, making the overall tooling lighter. The sealing end cap is made of aluminum alloy to enhance the overall structural strength, and features threaded holes on the outer edge. The bladder body, sealing flange, and sealing end cap are connected as an integral structure using bolts. The end of the sealing end cap that contacts the sealing flange is a flat end face, while the end that contacts the sealing ring is a grooved end face. The sealing end cap and sealing ring are connected by an O-ring in the groove for sealing. The sealing ring is made of POM material and is bolted to the symmetrical structure on both sides composed of the bladder body, sealing flange, and sealing end cap.

[0020] It also includes a base 5, made of rigid sponge material, ensuring both lightweight construction and adequate support for the overall tooling structure. The base consists of an inner base and an outer base. The inner base supports the pressure chamber, while the outer base supports it from the outside. Together, the inner and outer bases provide support for the underwater vehicle. Furthermore, a digital pressure gauge is installed, connected via an M10 threaded hole on the sealing ring, to display the real-time pressure inside the pressure chamber, ensuring a positive pressure of 2 bar.

[0021] A one-way valve is installed in series on the pipeline connecting the pressurization pump and the sealed capsule, and the connection is sealed through the G1 / 8 threaded hole on the sealing ring to ensure the experimental condition of positive pressure inside the sealed capsule.

[0022] In practical application, the underwater glider body is first wirelessly connected to the computer deck software. Then, the body is placed inside the pressurization chamber, and the entire structure is sealed by simultaneously connecting the central sealing ring to the flanges of the sealing capsules on both sides. Next, positive pressure is applied to the sealing capsules through the pre-drilled inflation holes on the sealing rings until 2 bar is reached. The pressure inside the glider body structure is then monitored using the computer deck software (P1), and the internal pressure of the sealing capsules (P2) is measured using a digital pressure gauge.

[0023] If the glider is well-sealed, according to the formula pV=nRT, the air pressure inside the sealed capsule and the glider cabin will not change in a short period of time.

[0024] If a partial leak occurs in the glider, the sealed capsule will be under positive pressure while the cabin will be under negative pressure.

[0025] At this time, the air pressure inside the glider's main cabin is... It can be seen that when the amount of gas, R1, increases but the volume remains unchanged, the chamber pressure increases, corresponding to the internal conditions of the sealed capsule. It can be seen that at this time, the volume of the sealed capsule decreases, and the amount of gaseous substance R2 decreases. During the overall change, the overall volume of the sealed capsule changes, and the chamber pressure and internal pressure of the sealed capsule change, but the total amount of gaseous substance inside, i.e., the value of R1+R2, does not change.

[0026]

[0027] In summary, if the cabin pressure P1 of an underwater glider increases while the volume V1 remains unchanged, the volume of the bladder will gradually decrease due to the flexible structure of the sealed capsule, i.e., V2 decreases. This results in an increase in the reading of the digital pressure gauge P2, indicating that there is a leak in the glider.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A portable tooling for air tightness testing of underwater vehicles, characterized in that: The application relates to a sealed capsule and a sealed end cover assembly, the inside of the sealed capsule forms a pressurized cavity for arranging an underwater vehicle, the sealed end cover assembly is installed on the sealed capsule, the sealed end cover assembly in an open state forms an opening of the pressurized cavity, and the sealed capsule is connected with a pressurized pump.

2. The portable tooling for hydrofoil air-tightness testing of claim 1, wherein: The sealed capsule comprises two capsule bodies, the capsule bodies are cylindrical and one end is open; the end cover assembly comprises two sealed end covers connected to the open end of the capsule bodies respectively, and the two sealed end covers are connected to form the sealed capsule.

3. The portable tooling for hydrofoil testing of underwater vehicles of claim 2, wherein: The sealed end cover assembly comprises a sealed flange, the open end of the capsule body is fixedly connected between the sealed end cover and the sealed flange, and the sealed end cover and the sealed flange are connected through fasteners.

4. The portable tooling for hydrofoil testing of underwater vehicles of claim 3, wherein: The sealed end cover assembly comprises a sealed ring, and the two sealed end covers connected to the two capsule bodies are connected with the sealed ring through fasteners.

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