A seawater pressure compensator with liquid level detection

Abstract

The present invention discloses a seawater pressure compensator with liquid level detection, comprising an upper cylinder, a lower cylinder, a frame, a compensation membrane, a pressure plate, a spring, a bottom plate, a wire sensor, and a watertight connector. The upper cylinder and the lower cylinder are sealed and connected through the compensation membrane flange surface to form an upper cavity and a lower cavity that are independent of each other. The frame is slidably arranged in the lower cylinder, the compensation membrane is connected to the frame through the pressure plate, the bottom plate is fixed to the bottom of the lower cylinder, the spring connects the frame and the bottom plate, the wire sensor is arranged in the upper cavity and connected to the pressure plate to detect the axial position of the pressure plate, the watertight connector is arranged on the upper cylinder to connect the wire sensor and the external cable, and the upper cylinder is provided with an installation port. The present invention guides the axial movement of the compensation membrane through the cooperation between the pressure plate and the frame. After the compensator is immersed in seawater, the contact area between the inside and outside of the compensation membrane is the same. When the seawater pressure changes, the internal pressure of the compensator also changes with the seawater pressure, thereby achieving the purpose of seawater pressure compensation.

Description

Technical Field

[0001] The invention relates to a seawater pressure compensator with liquid level detection function. Background Art

[0002] In recent years, as my country continues to increase its investment in the marine sector, underwater operations and detection equipment are increasing year by year. Seawater pressure compensators are used to balance the impact of external seawater pressure on oil-filled cavity components. They are important sub-components in underwater equipment, and their performance directly affects the use status of underwater equipment. Summary of the invention

[0003] In view of the shortcomings of the existing seawater pressure compensators in use, the present invention discloses a seawater pressure compensator with liquid level detection, comprising an upper cylinder, a lower cylinder, a frame, a compensation membrane, a pressure plate, a spring, a bottom plate, a pull-wire sensor, and a watertight connector. The upper cylinder and the lower cylinder are connected by a flange, the compensation membrane is arranged between the upper cylinder and the lower cylinder to form an upper cavity and a lower cavity independent of each other, the frame is slidably arranged in the lower cylinder, the compensation membrane is connected to the frame through a pressure plate, the bottom plate is fixed to the bottom of the lower cylinder, and a flow port for inflow of seawater is provided on the bottom plate, the spring is arranged in the lower cavity and connects the frame and the bottom plate, the pull-wire sensor is arranged in the upper cavity and connected to the pressure plate for detecting the axial position of the pressure plate, the watertight connector is arranged on the upper cylinder for connecting the pull-wire sensor and an external cable, and a mounting port is arranged on the upper cylinder.

[0004] Furthermore, the lower end of the skeleton radially extends outward to form a guide edge that cooperates with the inner wall of the lower cylinder, and the skeleton and the inner wall of the lower cylinder form an annular cavity for accommodating the compensation membrane.

[0005] Furthermore, the pressing plate and the frame are fixed by bolts and nuts, and an O-ring is arranged between the bolts and the pressing plate.

[0006] Furthermore, the pull wire of the pull wire sensor is fixed by a screw, a wire cavity and a fixing cavity are arranged in the screw, the wire head of the pull wire sensor passes through the wire cavity and is fixed in the fixing cavity, and fillets are arranged on the upper and lower ends of the wire cavity, and the fillets R>0.5mm.

[0007] Furthermore, a guide ring is arranged on the bottom plate, and one end of the spring is sleeved on the guide ring.

[0008] Furthermore, at least three installation openings are provided.

[0009] Furthermore, an observation hole is provided on the side wall of the lower cylinder, and the observation hole is not higher than the maximum position of the downward movement of the compensation film.

[0010] Furthermore, the observation hole is a circular, square or waist-shaped hole.

[0011] Furthermore, a rounded corner is arranged in the observation hole.

[0012] Beneficial effects achieved by the present invention:

[0013] The present invention guides the axial movement of the compensation membrane by the cooperation between the pressure plate and the frame. After being immersed in seawater, the contact area inside and outside the compensation membrane is the same. When the seawater pressure changes, the internal pressure of the compensator also changes with the seawater pressure, thereby achieving the purpose of compensating the seawater pressure. The addition of a pull-wire sensor can provide real-time feedback on the compensator liquid level, effectively improving the performance and reliability of the compensator. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of a seawater pressure compensator with liquid level detection according to the present invention;

[0015] Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure from another perspective;

[0016] Figure 3 It is a cross-sectional view of a seawater pressure compensator with liquid level detection according to the present invention;

[0017] Figure 4 is a schematic diagram of the structure of a screw;

[0018] The reference numerals are as follows:

[0019] 1. Upper cylinder, 2. Lower cylinder, 3. Frame, 4. Compensation membrane, 5. Pressure plate, 6. Spring, 7. Bottom plate, 8. Pull wire sensor, 9. Watertight connector, 11. Upper cavity, 12. Mounting port, 21. Lower cavity, 22. Observation hole, 31. Guide edge, 32. Annular cavity, 51. Bolt, 52. Nut, 53. O-ring, 71. Flow port, 72. Guide ring, 81. Screw, 82. Wire cavity, 83. Fixed cavity, 84. Fillet. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] A seawater pressure compensator with liquid level detection, such as Figure 1-3As shown, it includes an upper cylinder 1, a lower cylinder 2, a frame 3, a compensation membrane 4, a pressure plate 5, a spring 6, a bottom plate 7, a pull-wire sensor 8, and a watertight connector 9. The upper cylinder 1 and the lower cylinder 2 are connected by flanges and fixed by screws. The seal between the upper cylinder 1 and the lower cylinder 2 is sealed by the flange surface of the compensation membrane 4. The sealing form of the flange surface of the compensation membrane includes a plane seal or a flange surface seal with an O-ring; wherein, the plane seal is that the compensation membrane 4 is installed between the flange surfaces of the upper cylinder 1 and the lower cylinder 2, and the sealing is achieved by clamping the compensation membrane 4 with screws; the flange surface seal form of the O-ring is that an O-ring is arranged on the flange flanges of the upper cylinder 1 and the lower cylinder 2, and the compensation membrane 4 is installed between the flange surfaces of the upper cylinder 1 and the lower cylinder 2, and the sealing is achieved by clamping the compensation membrane 4 with screws. The upper cylinder 1 and the compensation membrane 4 form a sealed upper cavity 11, and the lower cylinder and the compensation membrane 4 form an open lower cavity 21. The skeleton 3 is slidably arranged in the lower cylinder 2, and the inner wall of the lower cylinder 2 is used to guide the axial movement of the skeleton 3. The compensation membrane 4 is fixed to the skeleton 3 by the pressure plate 5. The bottom plate 7 is fixedly installed at the bottom of the lower cylinder 2 by screws, and a flow port 71 for the flow of seawater is opened on the bottom plate 7. The spring 6 is arranged in the lower cavity 21 and connects the skeleton 3 and the bottom plate 7. The spring 6 is used to keep the compensator always maintain a certain positive pressure relative to the seawater, and the positive pressure range is 0.05bar to 0.5bar. The pull-wire sensor 8 is arranged in the upper cavity 11 and connected to the pressure plate 5, and is used to detect the axial position of the pressure plate 5. The water-tight connector is arranged on the upper cylinder 1, and is used to connect the pull-wire sensor 8 and the external cable to ensure the sealing of the upper cavity 11. The upper cylinder 1 is provided with a mounting port 12 for connectors, ball valves and compensation ports, etc. Preferably, at least three installation ports 12 are provided, one of which is used for installing the watertight connector 9 , another is used for a compensation port connected to the equipment through a hose, and another is used for installing a ball valve for injecting hydraulic oil into the upper cavity 11 .

[0022] In one embodiment, if Figure 1-3 As shown, the lower end of the skeleton 3 extends radially outward to form a guide edge 31 that cooperates with the inner wall of the lower cylinder, and the skeleton 3 and the inner wall of the lower cylinder 2 form an annular cavity 32 for accommodating the compensation film. The skeleton 3 has a guiding function to keep the compensation film 4 in axial movement during the up and down movement.

[0023] In one embodiment, if Figure 1-3 As shown, the pressing plate 5 and the frame 3 are fixed by bolts 51 and nuts 52, and an O-ring 53 is arranged between the bolts 51 and the pressing plate 5 to achieve sealing between the bolts 51 and the pressing plate 5.

[0024] In one embodiment, if Figure 1-4As shown, the pull wire of the pull wire sensor 8 is fixed by a screw 81, and a wire cavity 82 and a fixed cavity 83 are arranged in the screw 81. The wire head of the pull wire sensor 8 passes through the wire cavity 82 and is fixed in the fixed cavity 83. Rounded corners 84 are arranged on the upper and lower ends of the wire cavity 82, and the rounded corners are greater than 0.5 mm. The fixed cavity 83 is larger than the wire cavity 82, that is, after the wire head passes through the wire cavity 82, a knot is tied at its end or a component with a larger diameter is fixed, so that the wire head is fixed in the fixed cavity 83. The rounded corner is used to reduce the friction between the wire head and the screw 81, which causes the wire head to be worn off. Preferably, a screw hole is arranged at the axis of the bolt 51, and the screw 81 is threadedly matched with the screw hole.

[0025] In one embodiment, if Figure 1-3 As shown, a guide ring 72 is provided on the bottom plate 7, and one end of the spring 6 is sleeved on the guide ring 72 to guide the spring 6 to be compressed and expanded.

[0026] In one embodiment, if Figure 1-3 As shown, an observation hole 22 is provided on the side wall of the lower cylinder 2, and the observation hole 22 is not higher than the maximum downward movement position of the compensation film 4. The shape of the observation hole 22 includes but is not limited to a circular, square or waist-shaped hole. In addition, in order to avoid unnecessary wear during the axial movement of the compensation film 4, no matter what shape the observation hole 22 is, a rounded corner needs to be set inside the observation hole 22.

[0027] When the present invention is used, Figure 1-4 As shown, hydraulic oil is injected into the upper cavity 11 through a ball valve, and the compensator is connected to the equipment through a hose. When the compensator enters the seawater, the hydraulic oil in the upper cavity 11 acts on the pressure plate 5, and the contact area of ​​the external downlight is directly in contact with the seawater. When the seawater pressure increases, the hydraulic oil in the upper cavity 11 is filled into the equipment; and when the seawater pressure decreases, the hydraulic oil in the equipment flows back into the compensator. Thus, the purpose of seawater compensation is achieved.

[0028] The above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. If the present invention is modified or replaced by equivalents without departing from the spirit and scope of the present invention, they should all be included in the protection scope of the claims of the present invention.

Claims

1. A seawater pressure compensator with liquid level detection, characterized in that: It includes an upper cylinder, a lower cylinder, a frame, a compensation membrane, a pressure plate, a spring, a bottom plate, a wire sensor, and a watertight connector. The upper cylinder and the lower cylinder are connected by a flange. The compensation membrane is arranged between the upper cylinder and the lower cylinder to form an upper cavity and a lower cavity that are independent of each other. The frame is slidably arranged in the lower cylinder. The compensation membrane is connected to the frame through a pressure plate. The bottom plate is fixed to the bottom of the lower cylinder, and a flow port for inflow of seawater is provided on the bottom plate. The spring is arranged in the lower cavity and connects the frame and the bottom plate. The wire sensor is arranged in the upper cavity and connected to the pressure plate to detect the axial position of the pressure plate. The watertight connector is arranged on the upper cylinder to connect the wire sensor and an external cable. A mounting port is arranged on the upper cylinder. The lower end of the frame radially extends outward to form a guide edge that cooperates with the inner wall of the lower cylinder. The frame and the inner wall of the lower cylinder form an annular cavity for accommodating the compensation membrane. The pressure plate and the frame are fixed by bolts and nuts.

2. A seawater pressure compensator with liquid level detection according to claim 1, characterized in that: An O-ring is arranged between the bolt and the pressing plate.

3. The seawater pressure compensator with liquid level detection according to claim 1, characterized in that: The wire of the wire sensor is fixed by a screw, a wire cavity and a fixing cavity are arranged in the screw, the wire head of the wire sensor passes through the wire cavity and is fixed in the fixing cavity, and fillets are arranged on the upper and lower ends of the wire cavity, and the fillet R>0.5mm.

4. The seawater pressure compensator with liquid level detection according to claim 1, characterized in that: A guide ring is arranged on the bottom plate, and one end of the spring is sleeved on the guide ring.

5. The seawater pressure compensator with liquid level detection according to claim 1, characterized in that: At least three installation openings are provided.

6. The seawater pressure compensator with liquid level detection according to claim 1, characterized in that: An observation hole is provided on the side wall of the lower cylinder, and the observation hole is not higher than the maximum downward movement position of the compensation film.

7. The seawater pressure compensator with liquid level detection according to claim 6, characterized in that: The observation hole is a circular, square or waist-shaped hole.

8. The seawater pressure compensator with liquid level detection according to claim 6, characterized in that: A rounded corner is arranged in the observation hole.

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