A full-depth internal and external pressure balancing device

Abstract

The utility model relates to a kind of full-sea depth inside and outside pressure balancing device, and its technical scheme main points are: including: the shell with rotating mechanism in inside, and the pressure bladder that can accommodate seawater;Perforated hole is opened in the shell and penetrates its wall body;The inner wall of the perforated hole is provided with internal thread;The assembly end of the pressure bladder is provided with the external thread compatible with the internal thread;The pressure bladder is fixed in the internal thread connection of the shell, and its opening end is communicated with the perforated hole;Mineral oil is filled in the chamber in the shell interior, and the mineral oil completely wraps the pressure bladder;Overall structure is simple, manufacturing and maintenance cost is low, and sealing reliability is high, and the rotating mechanism of adaptation different depth deep-sea environment.

Description

Technical Field

[0001] This utility model relates to the field of marine engineering technology, and more specifically, it relates to a full-ocean-depth internal and external pressure balancing device. Background Technology

[0002] In the research and development and manufacturing of deep-sea equipment, sealing technology is one of the core technical challenges, especially for deep-sea equipment at depths of 10,000 meters, which can withstand seawater pressure of over 100 MPa. Such a high-pressure environment has hindered the research and development of many scientific research equipment.

[0003] Currently, there are two main sealing (pressure resistance) solutions for deep-sea equipment in the industry: 1. Increasing the thickness of the equipment shell: This increases the internal pressure resistance by thickening the shell material to withstand external seawater pressure. However, this solution significantly increases the overall weight and size of the equipment, increasing the difficulty of transportation and deployment, and affecting the mobility of the equipment (especially the rotating mechanisms), failing to meet the operational requirements of the rotating mechanisms; 2. Filling the equipment with mineral oil: This involves filling the equipment with mineral oil, utilizing its fluidity to offset some of the external pressure and achieve pressure balance. This technology is relatively mature, but in practical applications, due to slight pressure fluctuations inside and outside the equipment, mineral oil is prone to leakage. After each operation, the equipment must be disassembled and inspected, and the leaked mineral oil replenished, resulting in a cumbersome and costly maintenance process. Furthermore, it cannot guarantee a reliable seal for the rotating mechanisms in the long term. Therefore, there is an urgent need for a balancing device that is compatible with the rotating mechanisms of deep-sea equipment, has a simple structure, and low maintenance costs. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a full-ocean-depth internal and external pressure balancing device to solve the technical problems existing in the background technology.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a full-ocean-depth internal and external pressure balancing device, comprising: an outer shell with an internal rotating mechanism and a pressure bladder capable of containing seawater; an opening penetrating the wall of the outer shell; an internal thread provided on the inner wall of the opening; an external thread adapted to the internal thread provided at the assembly end of the pressure bladder; the pressure bladder being threadedly fixed inside the outer shell, and its opening end communicating with the opening; the cavity inside the outer shell being filled with mineral oil, and the mineral oil completely enveloping the pressure bladder.

[0006] Optionally, the pressure bladder is made of an elastic material resistant to seawater corrosion; the elastic material is nitrile rubber or fluororubber.

[0007] Optionally, the opening is formed on the side wall of the housing near the rotating mechanism, and the axis of the opening is perpendicular to the housing wall.

[0008] Optionally, the wall thickness of the pressure bladder is 1-2 mm.

[0009] Optionally, the mineral oil is an industrial-grade high-pressure resistant mineral oil with a kinematic viscosity of 20-60 mm² / s at 40°C.

[0010] This utility model has a simple overall structure, low manufacturing and maintenance costs, high sealing reliability, and a rotating mechanism that is adaptable to different deep-sea environments. Attached Figure Description

[0011] Figure 1 This is a cross-sectional view of the present invention.

[0012] In the diagram: 1. Outer shell; 2. Pressure bladder; 3. Opening; 4. Mineral oil. Detailed Implementation

[0013] To make the objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein.

[0014] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0015] In this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. The terms "vertical," "horizontal," "left," "right," "above," "below," and similar expressions are for illustrative purposes only and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0016] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] This invention provides a full-ocean-depth internal and external pressure balancing device, such as... Figure 1 As shown, it includes: an outer shell 1 with an internal rotating mechanism and a pressure bladder 2 capable of containing seawater; the outer shell 1 has an opening 3 penetrating its wall; the inner wall of the opening 3 is provided with an internal thread; the assembly end of the pressure bladder 2 is provided with an external thread adapted to the internal thread; the pressure bladder 2 is threadedly fixed inside the outer shell 1, and its opening end communicates with the opening 3; the cavity inside the outer shell 1 is filled with mineral oil 4, and the mineral oil 4 completely covers the pressure bladder 2.

[0018] In this embodiment, the outer shell 1 is made of titanium alloy, and the wall thickness is determined according to the overall design of the equipment to ensure the strength of the basic structure. A through hole is machined on the side wall of the outer shell 1 near the rotating mechanism, and then the internal thread is tapped to ensure a stable connection with the pressure bladder 2. The pressure bladder 2 is made of nitrile rubber (resistant to seawater corrosion and with good elasticity) or fluororubber (strong corrosion resistance, suitable for high salinity and highly polluted deep-sea environments) and is made into a near-circular bladder. The outer wall of its assembly end is machined with an external thread bladder wall that matches the aforementioned internal thread, with a thickness of 1-2 mm, and the open end is coaxial with the threaded section. 46# industrial-grade high-pressure resistant mineral oil 4 is selected, with a kinematic viscosity of 20-60 mm² / s at 40°C, which has good high-pressure resistance and lubrication. During assembly, align the external thread of the pressure bladder 2 with the internal thread of the opening 3 of the outer shell 1, and rotate the pressure bladder 2 clockwise until the threads are fully engaged, thus fixing it inside the outer shell 1. At this time, the opening end of the pressure bladder 2 is connected to the outside of the outer shell 1 and can receive seawater. Assemble the rotating mechanism to the preset position inside the outer shell 1, ensuring that the moving parts of the rotating mechanism are completely immersed in mineral oil 4. The operator injects No. 46 high-pressure resistant mineral oil 4 into the internal chamber of the outer shell 1 through the oil injection port on the outer shell 1 (existing equipment conventional interface, or a temporarily opened oil injection hole). During the injection process, gently shake the equipment to expel the air in the chamber until the mineral oil 4 fills the entire chamber without any air bubbles remaining. Then seal the oil injection port. During operation, during the descent phase: As the equipment descends, external seawater enters the pressure bladder 2 through opening 3, causing the bladder to gradually expand. For example, at a depth of 1000 meters, the seawater pressure is approximately 10 MPa, and the bladder expands to its maximum volume (30 mL). At this point, the pressure of the mineral oil 4 is balanced with the seawater pressure. During the operation phase: The rotating mechanism starts in the mineral oil 4, which provides lubrication. Due to the balance of internal and external pressures, there is no leakage, and the mechanism operates flexibly, meeting operational requirements. After the operation is completed, the equipment is retrieved to land, and the pressure bladder 2 is inspected for damage or cracks. If the bladder is intact, there is no need to replenish the mineral oil 4, and it can be used directly for the next operation. If the bladder is damaged, a new pressure bladder 2 is replaced, and the mineral oil 4 is refilled.

[0019] Furthermore, the opening 3 is formed on the side wall of the outer casing 1 near the rotating mechanism, and the axis of the opening 3 is perpendicular to the wall of the outer casing 1.

[0020] This utility model discloses a full-ocean-depth internal and external pressure balancing device with a simple overall structure, low manufacturing and maintenance costs, high sealing reliability, and a rotating mechanism adapted to different deep-sea environments.

[0021] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A full-ocean-depth internal and external pressure balancing device, characterized in that, include: The device includes an outer shell with a rotating mechanism and a pressure bladder capable of holding seawater. The outer shell has an opening that penetrates its wall. The inner wall of the opening has an internal thread. The assembly end of the pressure bladder has an external thread that matches the internal thread. The pressure bladder is threadedly fixed inside the outer shell, and its opening end communicates with the opening. The cavity inside the outer shell is filled with mineral oil, and the mineral oil completely covers the pressure bladder.

2. The full-ocean-depth internal and external pressure balancing device according to claim 1, characterized in that, The pressure bladder is made of an elastic material resistant to seawater corrosion; the elastic material is nitrile rubber or fluororubber.

3. The full-ocean-depth internal and external pressure balancing device according to claim 2, characterized in that, The opening is located on the side wall of the outer casing near the rotating mechanism, and the axis of the opening is perpendicular to the outer casing wall.

4. The full-ocean-depth internal and external pressure balancing device according to claim 1, characterized in that, The wall thickness of the pressure bladder is 1-2 mm.

5. A full-ocean-depth internal and external pressure balancing device according to claim 1, characterized in that, The mineral oil is an industrial-grade, high-pressure resistant mineral oil with a kinematic viscosity of 20-60 mm² / s at 40°C.

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