Vent valve assembly for a deep submersible

Abstract

The application discloses a breather valve device suitable for a large-depth submersible, which comprises a hydraulic machine, a transmission mechanism and a breather valve disc; the hydraulic machine comprises a shell, a hydraulic cylinder, a crankshaft and a top rod, a pair of pistons and a rack connected between the pistons are arranged in the hydraulic cylinder, one end of the crankshaft is engaged with the rack through a gear, an eccentric section is hinged to one end of the top rod through a connecting rod, and the other end of the top rod extends out of the shell; the transmission mechanism comprises a short rod and a long rod, one end of the short rod is connected with the extending end of the top rod through a thread and a conical pin, the other end of the short rod is connected with one end of the long rod through a ball hinge structure, and the other end of the long rod is matched with a fisheye support provided with a spherical bearing; and the breather valve disc comprises a valve disc, a cover nut and an adjusting nut. The application has the advantages of increased radial compensation capacity, increased axial adjusting range, good deformation coordination capacity, adaptability to large-depth environment, improved stability of the transmission rod, realized long-distance transmission, simple structure and stable transmission.

Description

Technical Field

[0001] This invention belongs to the field of diving and buoyancy system equipment, and specifically relates to a snorkeling valve device suitable for deep-sea submersibles. Background Technology

[0002] The vent valve device of the ballast water tank is an important component of the submerged floating system. It is mainly used to smoothly and without jamming close and open the air intake and exhaust channels on the top of the ballast water tank within a specified time.

[0003] Currently, some venting valve devices use hydraulic presses to linearly drive the venting valve to open and close. Although this device has advantages such as simple structure and high reliability, there are several drawbacks: First, the sealing of the part of the hydraulic press rod that contacts the seawater cannot be directly applied to deep-sea environments; second, its deformation coordination ability is limited (no radial deformation coordination ability), and the transmission distance is generally no more than 1m, making it unsuitable for long-distance transmission.

[0004] Currently, some venting valve devices are classified into rotary venting valves and direct-acting venting valves based on their driving method. Among them:

[0005] The rotary vent valve is driven by a built-in hydraulic motor, and the transmission mechanism uses a universal joint and a rotating shaft. The vent valve disc is opened and closed by rotating a screw. This vent valve device has the characteristics of long transmission distance (1m to 3m) and strong deformation coordination ability (with axial compensation ability). The disadvantages are that it is difficult to prevent corrosion and leakage of the drive module and valve disc, and it is also large in size and complex in structure.

[0006] Direct-acting vent valves are further divided into externally driven vent valves and internally driven vent valves. For internally driven vent valves, this type of vent valve is driven by an internal hydraulic press, and the transmission mechanism uses a crank-connecting rod mechanism to open and close the vent valve. Its advantage is that it can be designed for long-distance transmission (2m–5m) according to actual usage requirements. Its disadvantages are weak deformation coordination (no axial deformation compensation) and complex structure. For externally driven vent valves, this type of vent valve can adapt to long-distance transmission (1m–4m) and is largely unaffected by deformation coordination. Its disadvantages are the lack of emergency manual operation function and higher reliability requirements for the outboard drive device itself. Summary of the Invention

[0007] The purpose of this invention is to provide a snorkel valve device suitable for deep-sea submersibles, which increases radial compensation capability, expands axial adjustment range, has good deformation coordination capability, adapts to deep-sea environments, improves transmission rod stability, realizes long-distance transmission, and has a simple structure and stable transmission.

[0008] The technical solution adopted in this invention is:

[0009] A snorkel valve device suitable for deep-sea submersibles includes a hydraulic press, a transmission mechanism, and a snorkel valve disc. The hydraulic press includes a housing, a hydraulic cylinder mounted on the side of the housing, a crankshaft rotatably mounted at the bottom, and a push rod slidably fitted at the top. The hydraulic cylinder contains a pair of pistons and a rack connected between the pistons. One end of the crankshaft meshes with the rack via a gear, and an eccentric section is hinged to one end of the push rod via a connecting rod. The other end of the push rod extends out of the housing. The transmission mechanism includes a short rod and a long rod. One end of the short rod is connected to the... The top rod extends to one end and is connected to the other end via a ball joint structure. The other end of the long rod passes through a fisheye bracket with a spherical bearing. The vent valve disc includes a valve disc, an outer cover nut, and an adjusting nut. The outer edge of the outer cover nut is connected to the outer edge of the valve disc and sealed by a sealing ring. The central thread is fitted onto the center of the valve disc. The adjusting nut is threaded into the center of the outer cover nut and abuts against the end face of the center of the valve disc. The working end of the long rod extends into the center of the valve disc and the outer cover nut and engages with the valve core through the arc-shaped surface at the end.

[0010] Furthermore, in the transmission mechanism, the ball joint structure includes a ball head at the end of the short rod, a hemispherical groove at the end of the long rod, and a spherical threaded sleeve. The spherical threaded sleeve is fitted onto the short rod and, in conjunction with the hemispherical groove, encloses the ball head. The spherical threaded sleeve and the hemispherical groove are threaded together and fastened with screws. The fisheye bracket includes a spherical bearing, a spherical support, and a spherical pressure ring. The spherical support and the spherical pressure ring are respectively fitted onto the lower and upper parts of the spherical bearing. The spherical pressure ring is installed and fixed by studs, washers, and nuts, and presses the spherical support tightly.

[0011] Furthermore, the long rod is divided into two sections, which are connected by threads and tapered pins.

[0012] Furthermore, the hydraulic press is mounted on a hydraulic press base, the upper part of the hydraulic press base is connected to the trap component, the transmission mechanism passes through the hydraulic press base and the trap component, and the fisheye bracket is located at the top of the trap component.

[0013] Furthermore, the hydraulic press and its base are mounted via flanges, designed according to the "DQSQT Pressure-Resistant Ship Hull Flange Connection Dimensions and Sealing Surfaces". The sealing gaskets are made of asbestos rubber sheet, and the fastening studs are made of high-strength alloy steel. Appropriate preload is applied to the studs to ensure that they can provide the axial force required for sealing and also have a sufficient safety factor.

[0014] Furthermore, the hydraulic press has two operating modes: remote control and local emergency manual control. Both the local and remote control consoles of the hydraulic press are equipped with status indicator lights, and the brake of the hydraulic press is equipped with a copper padlock to prevent accidental operation by the user.

[0015] Furthermore, the hydraulic press is equipped with a multi-layer stuffing box seal and two sealing rings, inner and outer, at the push rod.

[0016] Furthermore, the push rod and transmission mechanism are made of high-strength materials resistant to seawater corrosion, and all connections of the transmission mechanism are electrically insulated.

[0017] Furthermore, the sealing ring is made of compounded rubber, and the width of the sealing ring indentation is tested and evaluated.

[0018] Furthermore, the crankshaft is rotatably mounted on the lower part of the housing via bearing bushes and bearing caps, and an oil receiving pan is provided on the lower side of the crankshaft.

[0019] The beneficial effects of this invention are:

[0020] The transmission mechanism employs a ball joint structure and a fisheye bracket, enabling it to adapt to radial offset effects caused by machining and installation errors, welding stress, and hull structural deformation, thus increasing radial compensation capability. The threaded connection between the adjusting nut and the outer cover nut, as well as the threaded connection between the short rod and the top rod, can adjust axial installation errors, increasing the axial adjustment range. The entire device has good deformation coordination capability and is suitable for deep environments (not less than 350m). The top rod, short rod, ball joint structure, and long rod are connected sequentially to form the transmission rod. The long rod also passes through the fisheye bracket, which improves the transmission rod support method, reduces the cantilever length ratio, and increases the transmission rod's moment of inertia, improving its stability and enabling long-distance transmission (2m~4m). The piston in the hydraulic cylinder drives the rack to move, which in turn drives the crankshaft to rotate via gears. The crankshaft then drives the top rod to rise and fall via connecting rods. The structure is simple and the transmission is stable. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the snorkel valve device applicable to deep-sea submersibles in an embodiment of the present invention.

[0022] Figure 2 This is a cross-section of the hydraulic press in an embodiment of the present invention. Figure 1 .

[0023] Figure 3 This is a cross-section of the hydraulic press in an embodiment of the present invention. Figure 2 .

[0024] Figure 4 yes Figure 2 A partial schematic diagram of the direction A in the middle.

[0025] Figure 5 yes Figure 2 Cross-sectional view of BB in the middle.

[0026] Figure 6 yes Figure 2 Cross-sectional view of CC.

[0027] Figure 7 This is a cross-sectional view of the transmission mechanism in an embodiment of the present invention.

[0028] Figure 8 This is a cross-sectional view of the vent valve disc in an embodiment of the present invention.

[0029] In the picture:

[0030] 1-Hydraulic press; 2-Transmission mechanism; 3-Vacuum valve disc; 4-Entrapment component; 5-Hydraulic press base;

[0031] 11-Housing; 12-Crankshaft; 13-Status indicator light; 14-Pressure lubricator; 15-Bearing cap; 16-Rack; 17-Bearing bush; 18-Packing; 19-Pin; 110-Push rod; 111-Washer; 112-Stud; 113-Nut; 114-Bolt; 115-Nut; 116-Nut; 117-Washer; 118-Stud; 119-Packing gland; 120-Packing; 121-Pin; 122-Screw; 123-Hydraulic cylinder; 124-Needle plug; 125-Piston; 126-Bottom cover; 127-Screw; 128-Washer; 129-Brake; 130-Screw; 131-Washer; 132-Cap nut; 133-Oil tray; 134-Brass padlock; 135-Washer; 136-Stud; 137-Nut;

[0032] 21-Short rod; 22-Spherical threaded sleeve; 23-Long rod section one; 24-Tapered pin; 25-Spherical bearing; 26-Spherical support; 27-Spherical pressure ring; 28-Long rod section two; 29-Nut; 210-Stud; 211-Washer; 212-Screw;

[0033] 31-Sealing ring; 32-Outer cover nut; 33-Adjusting nut; 34-Valve disc. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0035] like Figures 1 to 8As shown, a snorkel valve device suitable for deep-sea submersibles includes a hydraulic press 1, a transmission mechanism 2, and a snorkel valve disc 3. The hydraulic press 1 includes a housing 11, a hydraulic cylinder 123 mounted on the side of the housing 11, a crankshaft 12 rotatably mounted on the lower part, and a push rod 110 slidably fitted on the upper part. The hydraulic cylinder 123 is provided with a pair of pistons 125 and a rack 16 connected between the pistons 125. One end of the crankshaft 12 meshes with the rack 16 through a gear, and the eccentric section is hinged to one end of the push rod 110 through a connecting rod. The other end of the push rod 110 extends out of the housing 11. The transmission mechanism 2 includes a short rod 21 and a long rod (23, 28). One end of the short rod 21... The long rod 28 is connected to the extended end of the push rod 110 via a thread and a tapered pin, and the other end is connected to one end of the long rod 23 via a ball joint structure. The other end of the long rod 28 passes through a fisheye bracket with a spherical bearing 25. The vent valve disc 3 includes a valve disc 34, an outer cover nut 32, and an adjusting nut 33. The outer edge of the outer cover nut 32 is connected to the outer edge of the valve disc 34 and sealed by a sealing ring 31. The central part is threaded onto the center of the valve disc 34. The adjusting nut 33 is threaded into the center of the outer cover nut 32 and abuts against the end face of the center of the valve disc 34. The working end of the long rod 28 extends into the center of the valve disc 34 and the outer cover nut 32 and engages with the valve core through the arc-shaped surface at the end. The transmission mechanism 2 adopts a ball joint structure and a fisheye bracket, which enables the transmission mechanism 2 to adapt to the radial offset caused by machining and installation errors, welding stress, and hull structural deformation, thereby increasing the radial compensation capability. The threaded connection between the adjusting nut 33 and the outer cover nut 32, as well as the threaded connection between the short rod 21 and the top rod 110, can adjust the axial installation error and increase the axial adjustment range. The entire device has good deformation coordination capability and is suitable for deep environments (not less than 350m). The top rod 110, short rod 21, ball joint structure, and long rods (23, 28) are connected in sequence to form the transmission rod. The long rod 28 also passes through the fisheye bracket, which improves the transmission rod support method and reduces the proportion of cantilever length. On the other hand, it increases the transmission rod moment of inertia and improves the stability of the transmission rod, realizing long-distance transmission (2m~4m). The piston 125 in the hydraulic cylinder 123 drives the rack 16 to move, and then the rack 16 drives the crankshaft 12 to rotate through the gear. Then the crankshaft 12 drives the top rod 110 to rise and fall through the connecting rod. The structure is simple and the transmission is stable.

[0036] like Figure 1 As shown, the hydraulic press 1 is mounted on the hydraulic press base 5. The upper part of the hydraulic press base 5 is connected to the trap component 4. The transmission mechanism 2 passes through the hydraulic press base 5 and the trap component 4. The fisheye bracket is located at the top of the trap component 4. In this embodiment, the hydraulic press 1 and the hydraulic press base 5 are installed through a flange. The design is based on the "DQSQT Pressure-Resistant Ship Hull Flange Connection Dimensions and Sealing Surface". The sealing gasket is made of asbestos rubber sheet material with mature application experience. The fastening stud is made of high-strength alloy steel material. A suitable preload is applied to the stud so that the stud can ensure the axial force required for sealing and also has a sufficient safety factor.

[0037] In this embodiment, the hydraulic press 1 has two operating modes: remote control and local emergency manual control, such as... Figure 4 As shown, both the local and remote control consoles of the hydraulic press 1 are equipped with status indicator lights 13, and the brake 129 of the hydraulic press 1 is equipped with a copper padlock 134 to prevent accidental operation by the user. It is convenient to operate and maintain and has high reliability.

[0038] like Figure 2 and Figure 3 As shown, in this embodiment, the hydraulic press 1 is equipped with a multi-layer packing 120 gland seal and two inner and outer sealing rings at the top rod 110. The combined sealing method can effectively block seawater and ensure the safety of the user.

[0039] like Figures 2 to 4 As shown, in this embodiment, the crankshaft 12 is rotatably mounted on the lower part of the housing 11 via the bearing bush 17 and the bearing cover 15, and an oil receiving pan 133 is provided on the lower side of the crankshaft 12.

[0040] like Figure 7 As shown, in this embodiment, the ball joint structure includes a ball head at the end of the short rod 21, a hemispherical groove at the end of the long rod 23, and a spherical threaded sleeve 22. The spherical threaded sleeve 22 is fitted onto the short rod 21 and cooperates with the hemispherical groove to enclose the ball head. The spherical threaded sleeve 22 and the hemispherical groove are threadedly connected and fastened by screws 212. The fisheye bracket includes a spherical bearing 25, a spherical support 26, and a spherical pressure ring 27. The spherical support 26 and the spherical pressure ring 27 are respectively fitted onto the lower and upper parts of the spherical bearing 25. The spherical pressure ring 27 is installed and fixed by studs 210, washers 211, and nuts 29 and presses the spherical support 26 tightly.

[0041] like Figure 7 As shown, in this embodiment, the long rod is divided into two sections (23, 28), which are connected by threads and a tapered pin 24.

[0042] In this embodiment, the push rod 110 and the transmission mechanism 2 are made of high-strength materials resistant to seawater corrosion, which protects the components immersed in seawater and improves the reliability and service life of the equipment. The various connections of the transmission mechanism 2 are electrically insulated, which can effectively avoid galvanic corrosion between dissimilar metals and improve the corrosion resistance of the equipment.

[0043] In this embodiment, the sealing ring 31 is made of compounded rubber material, and the indentation width of the sealing ring 31 is tested and evaluated to ensure the reliability of the valve disc 34 seal.

[0044] The vent valve disc 3 is located inside the vent top cover of the ballast water tank. When the ballast water tank is purged, the high-pressure air makes the valve disc 34 tighter and tighter, which improves the reliability of the seal and meets the design requirements for off-board installation, disassembly and maintenance.

[0045] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A snorkel valve device suitable for deep-sea submersibles, characterized in that: The system includes a hydraulic press, a transmission mechanism, and a vent valve disc. The hydraulic press includes a housing with a hydraulic cylinder mounted on its side, a crankshaft rotatably mounted on its lower part, and a push rod slidably fitted on its upper part. The hydraulic cylinder contains a pair of pistons and a rack connected between the pistons. One end of the crankshaft meshes with the rack via a gear, and its eccentric section is hinged to one end of the push rod via a connecting rod. The other end of the push rod extends out of the housing. The transmission mechanism includes a short rod and a long rod. One end of the short rod is connected to the extended end of the push rod via a thread and a tapered pin, and the other end is connected to one end of the long rod via a ball joint. The other end of the long rod passes through a fisheye bracket with a spherical bearing. The vent valve disc includes a valve disc, an outer cover nut, and an adjusting nut. The outer edge of the outer cover nut connects to the outer edge of the valve disc and is sealed by a sealing ring. The central thread of the outer cover nut is threaded onto the center of the valve disc. The adjusting nut is threaded into the center of the outer cover nut and abuts against the end face of the valve disc's center. The working end of the long rod extends into the center of the valve disc and the outer cover nut and engages with the valve core via its arc-shaped end surface. In the transmission mechanism, the ball joint structure includes a ball head at the end of the short rod, a hemispherical groove at the end of the long rod, and a spherical threaded sleeve. The spherical threaded sleeve is fitted onto the short rod and, in conjunction with the hemispherical groove, encloses the ball head. The spherical threaded sleeve and the hemispherical groove are threaded together and fastened with screws. The fisheye bracket includes a spherical bearing, a spherical support, and a spherical pressure ring. The spherical support and the spherical pressure ring are respectively fitted onto the lower and upper parts of the spherical bearing. The spherical pressure ring is installed and fixed by studs, washers, and nuts, and presses the spherical support tightly.

2. The snorkel valve device for deep-sea submersibles as described in claim 1, characterized in that: The long rod is divided into two sections, which are connected by threads and tapered pins.

3. The snorkel valve device for deep-sea submersibles as described in claim 1, characterized in that: The hydraulic press is mounted on a hydraulic press base, the upper part of which is connected to the trap component. The transmission mechanism passes through the hydraulic press base and the trap component, and the fisheye bracket is located at the top of the trap component.

4. The snorkel valve device for deep-sea submersibles as described in claim 3, characterized in that: The hydraulic press and its frame are mounted via flanges. The sealing gaskets are made of asbestos rubber sheet, and the fastening studs are made of high-strength alloy steel. Appropriate preload is applied to the studs to ensure that they can provide the axial force required for sealing while also having a sufficient safety factor.

5. The snorkel valve device for deep-sea submersibles as described in claim 1, characterized in that: The hydraulic press has two operating modes: remote control and local emergency manual control. Both the local and remote control consoles of the hydraulic press are equipped with status indicator lights, and the brake of the hydraulic press is equipped with a copper padlock to prevent accidental operation by the user.

6. The snorkel valve device for deep-sea submersibles as described in claim 1, characterized in that: The hydraulic press is equipped with a multi-layer stuffing box seal and two sealing rings, inner and outer, at the push rod.

7. The snorkel valve device for deep-sea submersibles as described in claim 1, characterized in that: The push rod and transmission mechanism are made of high-strength materials resistant to seawater corrosion, and all connections of the transmission mechanism are electrically insulated.

8. The snorkel valve device for deep-sea submersibles as described in claim 1, characterized in that: The sealing ring is made of compounded rubber, and the width of the sealing ring indentation is tested and evaluated.

9. The snorkel valve device for deep-sea submersibles as described in claim 1, characterized in that: The crankshaft is rotatably mounted on the lower part of the housing via bearing bushes and bearing caps, and an oil receiving pan is provided on the lower side of the crankshaft.

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