Large-tonnage buoyancy and trim adjusting device for deep sea distribution control

Abstract

The invention belongs to the technical field of underwater navigation, and discloses a deep sea distribution control large-tonnage buoyancy and trim adjusting device which comprises a seawater motor pump set, an electromagnetic stop valve set and a hydraulic control stop valve set. The hydraulic control stop valves are driven by high-pressure oil to be opened and closed. Compared with a traditional hydraulic control buoyancy adjusting device which needs to operate an external hydraulic system as a power source to open a hydraulic control stop valve, the hydraulic control buoyancy adjusting device has the advantages that the energy accumulator is pre-charged before work in advance, high-pressure oil in the energy accumulator is used for opening the hydraulic control stop valve when the hydraulic control buoyancy adjusting device works underwater, and vibration, noise and the like caused by operation of the hydraulic system can be avoided underwater; the device adopts a modular design, is high in integration level, can realize mutual rapid water adjustment of a bow water tank and a stern water tank to realize trim adjustment by arranging a set of adjusting device on each of the bow and the stern, can be suitable for buoyancy adjustment of a large-tonnage underwater vehicle, and is convenient to maintain and assemble.

Description

Technical Field

[0001] The present invention relates to the field of underwater navigation technology, and in particular to a large-tonnage buoyancy and trim regulating device with deep-sea distributed control. Background Art

[0002] The buoyancy control device is an important component of underwater vehicles. Typically, underwater vehicles must maintain a relatively stable buoyancy during operation. However, when operating in the ocean, the density of seawater changes with the depth and temperature of the seawater, often accompanied by ocean currents. This changes the buoyancy of the underwater vehicle, thus affecting its stable operation. Therefore, a buoyancy control device is required to adjust the buoyancy of the underwater vehicle to achieve a stable buoyancy state. Furthermore, the buoyancy can be adjusted to control the underwater vehicle's ascent and descent movements and attitude control. For large-tonnage submersibles, the ability to adjust a large flow rate is required to meet the submersible's buoyancy control requirements.

[0003] The stop valves used in traditional seawater pump-type buoyancy control devices can generally be divided into electromagnetic stop valves and hydraulic stop valves. Due to the limitation of the electromagnet thrust, the flow capacity of the electromagnetic stop valve is limited and it is generally only used for buoyancy control of small submersibles. The hydraulic stop valve generally requires an external independent hydraulic system to control the opening and closing of the valve. Traditional seawater pump-type buoyancy control devices rely on long pipes connected to the water tank at the other end to complete the longitudinal adjustment. During operation, they can only fill or drain water from one water tank, which makes the longitudinal adjustment slow. At the same time, when draining the water from the far water tank, the long pipe is insufficient to absorb the water, which can easily cause system vibration. Summary of the Invention

[0004] In response to the above-mentioned defects or improvement needs of the prior art, the present invention provides a large-tonnage buoyancy and trim adjustment device with deep-sea distributed control. By arranging a set of adjustment devices at the bow and stern, the bow and stern water tanks can be quickly adjusted to each other to achieve trim adjustment, which is suitable for buoyancy adjustment of large-tonnage underwater vehicles.

[0005] To achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided a large-tonnage buoyancy and trim adjustment device for deep-sea distributed control, comprising a seawater motor pump group, an electromagnetic stop valve group and a hydraulically controlled stop valve group, wherein the hydraulically controlled stop valve group comprises a plurality of hydraulically controlled stop valves, each of which is provided with a hydraulic control port and a seawater connection port, the electromagnetic stop valve group comprises an electromagnetic stop valve corresponding to the hydraulically controlled stop valve, each of which is provided with a first inlet cavity, a second inlet cavity and an outlet cavity, the first inlet cavity being connected to the accumulator and the high-pressure oil circuit, the second inlet cavity being connected to the low-pressure oil circuit, and the outlet cavity of each electromagnetic stop valve being connected to the liquid of the corresponding hydraulically controlled stop valve. The control chamber is connected, and the electromagnetic stop valve is used to control the on and off of the high-pressure oil in the high-pressure oil circuit to the hydraulic control chamber. The hydraulic control stop valve realizes opening and closing adjustment under the drive of the high-pressure oil, wherein the seawater connection port of one group of hydraulic control stop valves is connected to the inlet of the seawater motor pump group and the sea interface, the seawater connection port of one group of hydraulic control stop valves is connected to the outlet of the seawater motor pump group and the sea interface, the seawater connection port of one group of hydraulic control stop valves is connected to the inlet of the seawater motor pump group and the water tank interface of the main water tank, the seawater connection port of one group of hydraulic control stop valves is connected to the outlet of the seawater motor pump group and the water tank interface of the main water tank, and the other group is connected to the outlet of the seawater motor pump group and the interface of another buoyancy and trim adjustment device.

[0006] Preferably, the hydraulically controlled stop valve group includes a hydraulically controlled stop valve A1, a hydraulically controlled stop valve C1, a hydraulically controlled stop valve B1, a hydraulically controlled stop valve D1 and a hydraulically controlled stop valve E1, the seawater connection port outlet ends of the hydraulically controlled stop valve C1 and the hydraulically controlled stop valve D1 are connected to the inlet of the seawater motor pump group, the seawater connection port inlet ends of the hydraulically controlled stop valve A1, the hydraulically controlled stop valve B1 and the hydraulically controlled stop valve E1 are connected to the outlet of the seawater motor pump group, the seawater connection port outlet end of the hydraulically controlled stop valve A1 and the seawater connection port inlet end of the hydraulically controlled stop valve C1 are connected to the sea connection interface through a filter; the seawater connection port outlet end of the hydraulically controlled stop valve B1 and the seawater connection port inlet end of the hydraulically controlled stop valve D1 are connected to the water tank interface of the main water tank for water injection and drainage; the seawater connection port outlet end of the hydraulically controlled stop valve E1 is connected to the interface of another buoyancy and trim adjustment device for water regulation.

[0007] Preferably, the seawater motor pump group includes a deep-sea motor, a seawater pump and a vibration isolation bracket, the deep-sea motor and the seawater pump are installed on the vibration isolation bracket, and the seawater pump is connected to the hydraulically controlled shut-off valve group through a seawater pump outlet connecting hose and a seawater pump inlet hose respectively.

[0008] Preferably, the hydraulically controlled stop valve includes an upper end cover of the hydraulically controlled valve, a hydraulically controlled valve spool, a hydraulically controlled valve sleeve, a hydraulically controlled valve housing and a lower end cover of the hydraulically controlled valve. The upper end cover of the hydraulically controlled valve and the lower end cover of the hydraulically controlled valve are connected to the hydraulically controlled valve housing by bolts. The hydraulically controlled valve sleeve is installed in the hydraulically controlled valve housing and abuts against the upper end cover of the hydraulically controlled valve. The hydraulically controlled valve spool is installed in the hydraulically controlled valve sleeve and abuts against the hydraulically controlled valve sleeve at the bottom.

[0009] Preferably, the hydraulically controlled stop valve also includes a hydraulically controlled valve spring, a piston bracket and a hydraulically controlled valve piston. The hydraulically controlled valve spring is arranged in the hydraulically controlled valve spool, the piston bracket is installed to the lower middle part of the hydraulically controlled valve housing and is against the lower end cover of the hydraulically controlled valve, and the hydraulically controlled valve piston is installed in the piston bracket and is close to the hydraulically controlled valve spool at the top.

[0010] Preferably, a hydraulic control chamber and a sea-connecting chamber are provided in the hydraulic control valve piston, and an inlet chamber 1 and an outlet chamber 1 are provided on the hydraulic control valve housing. The hydraulic control chamber is connected to the hydraulic control port, and the sea-connecting chamber is connected to the inlet end and the outlet end of the seawater connection port. The inlet end of the seawater connection port is connected to the inlet chamber 1, and the outlet end of the seawater connection port is connected to the outlet chamber 1. The hydraulic control valve piston is installed with a grid ring and a piston bracket to isolate the hydraulic control chamber below it from the sea-connecting chamber above; the upper part of the hydraulic control valve spring is against the lower part of the upper end cover of the hydraulic control valve and acts on the hydraulic control valve spool, so that the hydraulic control valve spool and the hydraulic control valve sleeve are in contact to separate the inlet chamber 1 and the outlet chamber 1.

[0011] Preferably, the high-pressure oil circuit and the low-pressure oil circuit are connected to an oil pressure pump, and the oil pressure pump is connected to an accumulator.

[0012] Preferably, it includes a safety valve, the inlet of the safety valve is connected to the outlet of the seawater motor pump, and the outlet of the safety valve is connected to the inlet of the hydraulically controlled stop valve group and the seawater motor pump group; it also includes a controller and a sensor, and the sensor includes a pressure sensor and a temperature sensor. The pressure and temperature information transmitted by the pressure sensor and the temperature sensor is sent to the controller, thereby controlling the operation of the hydraulically controlled stop valve group, the electromagnetic stop valve group, and the seawater motor pump group respectively.

[0013] Preferably, at least one group of buoyancy and trim adjustment devices is provided, located at the bow and / or stern of the vessel. When a group of buoyancy and trim adjustment devices is arranged at the bow and stern of the vessel, they are used to perform mutual water adjustment.

[0014] In general, the above technical solutions conceived by the present invention have the following beneficial effects compared with the prior art:

[0015] This device integrates a hydraulically controlled shutoff valve group, a seawater motor pump group, and an electromagnetic shutoff valve group. Its high level of integration allows it to meet the buoyancy adjustment needs of large flow rates and deep depths. By placing a set of adjustment devices at the bow and stern, rapid water transfer between the bow and stern water tanks is achieved for trim adjustment. This makes it suitable for buoyancy adjustment of large-tonnage underwater vehicles, facilitating their maintenance and equipment. Furthermore, this device integrates a high-pressure accumulator. When the hydraulically controlled shutoff valve needs to be opened during operation, the high-pressure oil in the accumulator can be directly used, eliminating the need for an external hydraulic system to provide high-pressure hydraulic oil. This also reduces the vibration and noise generated by the hydraulic system during underwater operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1This is a schematic diagram of a large-tonnage buoyancy / trimming adjustment device for deep-sea distributed control;

[0017] Figure 2 A schematic diagram of the structure of a large-tonnage buoyancy / trimming adjustment device for deep-sea distributed control Figure 1 ;

[0018] Figure 3 A schematic diagram of the structure of a large-tonnage buoyancy / trimming adjustment device for deep-sea distributed control Figure 2 ;

[0019] Figure 4 The figure is a cross-sectional view of a hydraulically controlled stop valve in a large-tonnage buoyancy / trimming adjustment device for deep-sea distributed control.

[0020] In the accompanying drawings: deep-sea motor 1, vibration isolation bracket 2, seawater pump 3, accumulator 4, seawater pump outlet hose 5, electromagnetic stop valve group 6, seawater pump inlet hose 7, electromagnetic stop valve mounting valve block 8, filter 9, main body bracket 10, hydraulic control stop valve group 11, water tank interface flange 12, hydraulic control valve upper end cover 13, hydraulic control valve spool 14, hydraulic control valve spring 15, hydraulic control valve sleeve 16, piston bracket 17, hydraulic control valve housing 18, hydraulic control valve piston 19, hydraulic control valve lower end cover 20, inlet chamber 21, outlet chamber 22, sea passage cavity 23, hydraulic control cavity 24. DETAILED DESCRIPTION

[0021] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0022] See also Figure 1-4The present invention provides a large-tonnage buoyancy and trim adjustment device for deep-sea distributed control, comprising a seawater motor pump group, an electromagnetic stop valve group and a hydraulic stop valve group, wherein the hydraulic stop valve group comprises a plurality of hydraulic stop valves, each of which is provided with a hydraulic control port and a seawater connection port, and the electromagnetic stop valve group comprises an electromagnetic stop valve corresponding to the hydraulic stop valve one by one, each of which is provided with a first inlet cavity, a second inlet cavity and an outlet cavity, wherein the first inlet cavity is connected to the accumulator and the high-pressure oil circuit, the second inlet cavity is connected to the low-pressure oil circuit, and the outlet cavity of each electromagnetic stop valve is connected to the hydraulic control cavity of the corresponding hydraulic stop valve, and the electromagnetic stop valve is connected to the hydraulic control cavity of the corresponding hydraulic stop valve. The stop valve is used to control the on and off of the high-pressure oil in the high-pressure oil circuit flowing to the hydraulic control chamber. The hydraulically controlled stop valve realizes opening and closing adjustment under the drive of high-pressure oil, wherein the seawater connection port of one group of hydraulically controlled stop valves is connected to the inlet of the seawater motor pump group and the sea interface, the seawater connection port of one group of hydraulically controlled stop valves is connected to the outlet of the seawater motor pump group and the sea interface, the seawater connection port of one group of hydraulically controlled stop valves is connected to the inlet of the seawater motor pump group and the water tank interface of the main water tank, the seawater connection port of one group of hydraulically controlled stop valves is connected to the outlet of the seawater motor pump group and the water tank interface of the main water tank, and another group is connected to the outlet of the seawater motor pump group and the interface of another buoyancy and trim adjustment device.

[0023] That is, it includes a deep-sea motor 1, a vibration isolation bracket 2, a seawater pump 3, an accumulator 4, a seawater pump outlet connecting hose 5, an electromagnetic stop valve group 6, a seawater pump inlet hose 7, an electromagnetic stop valve mounting valve block 8, a filter 9, a main bracket 10, a hydraulic stop valve group 11, and a water tank interface flange 12. The hydraulic stop valve group 11 and the electromagnetic stop valve group 6 are arranged in the electrical compartment. The seawater motor pump group includes a deep-sea motor 1, a seawater pump 2 and a vibration isolation bracket 3. The deep-sea motor 1 drives the seawater pump 2 to work. The deep-sea motor 1 and the seawater pump 2 are installed on the vibration isolation bracket 3. The seawater pump 2 is connected to the hydraulic stop valve group 11 through the seawater pump outlet connecting hose 5 and the seawater pump inlet hose 7 respectively. The integrated design of this device is that the seawater motor pump group is the main vibration source in the device and is connected to the main bracket through the vibration isolation bracket, and the connection between the seawater motor pump group and the hydraulic stop valve group is connected through a hose, which effectively isolates the transmission of vibration. In addition, the main vibration source components, the seawater motor pump group and the main bracket are installed on the basis of vibration isolation brackets and are connected to the hydraulic control stop valve group through a hose, which largely isolates the transmission of vibration, so the overall vibration of the buoyancy adjustment device is low and the noise is small.

[0024] This device relies on a solenoid shutoff valve to control the hydraulic shutoff valve in conjunction with the hydraulic shutoff valve to control the filling and draining of the buoyancy control device. The control logic is simple. The shutoff valve group uses a large-flow hydraulic shutoff valve solution with strong flow capacity, making it suitable for large-flow buoyancy control.

[0025] Specifically, the hydraulically controlled stop valve group 11 includes five hydraulically controlled stop valves, namely, hydraulically controlled stop valve A1, hydraulically controlled stop valve C1, hydraulically controlled stop valve B1, hydraulically controlled stop valve D1 and hydraulically controlled stop valve E1; the electromagnetic stop valve group 6 includes five electromagnetic stop valves, namely, electromagnetic stop valve A, electromagnetic stop valve B, electromagnetic stop valve C, electromagnetic stop valve D and electromagnetic stop valve E; the outlet cavity of each electromagnetic stop valve is connected to the hydraulic control cavity of the corresponding hydraulically controlled stop valve, the seawater connection outlet ends of the hydraulically controlled stop valve C1 and the hydraulically controlled stop valve D1 are connected to the inlet of the seawater motor pump group, and the hydraulically controlled stop valves The seawater connection inlet ends of the check valve A1, the hydraulic stop valve B1 and the hydraulic stop valve E1 are connected to the outlet of the seawater motor pump group, the seawater connection outlet end of the hydraulic stop valve A1 and the seawater connection inlet end of the hydraulic stop valve C1 are connected to the sea connection interface through a filter, and the sea connection interface is connected to the marine environment; the seawater connection outlet end of the hydraulic stop valve B1 and the seawater connection inlet end of the hydraulic stop valve D1 are connected to the water tank interface of the main water tank for water filling and drainage; the seawater connection outlet end of the hydraulic stop valve E1 is connected to the interface of another buoyancy adjustment device for water regulation.

[0026] The principle is as follows: Opening hydraulic stop valves C1 and B1 activates the seawater motor pump group to fill the buoyancy control device. Opening hydraulic stop valves A1 and D1 activates the seawater motor pump group to drain the buoyancy control device. Opening hydraulic stop valves D1 and E1 activates the seawater motor pump group to transfer water from the main water tank to the stern water tank of the buoyancy control device.

[0027] Specifically, when the buoyancy regulating device is filled with water from the marine environment into the main water tank, the hydraulically controlled stop valve C1 and the hydraulically controlled stop valve B1 are opened and the deep-sea motor 1 directly drives the seawater pump 3. The seawater in the ocean passes through the hydraulically controlled stop valve C1 to the inlet chamber of the seawater pump 3, and is then injected into the main water tank through the hydraulically controlled stop valve B1 by the seawater pump outlet, so that the amount of water in the main water tank increases, the weight of the submersible increases, and the buoyancy decreases.

[0028] When the buoyancy regulating device discharges water from the main water tank to the marine environment, the hydraulically controlled stop valve A1 and the hydraulically controlled stop valve D1 are opened, and the deep-sea motor 1 directly drives the seawater pump 3. The seawater in the main water tank passes through the hydraulically controlled stop valve D1 to the inlet chamber of the seawater pump 3, and is then injected into the marine environment through the hydraulically controlled stop valve A1 by the seawater pump outlet, reducing the amount of water in the main water tank, reducing the weight of the submersible, and increasing the buoyancy.

[0029] When the buoyancy adjustment device transfers water from the main water tank to the stern water tank, the hydraulic control stop valve D1 and the hydraulic control stop valve E1 are opened, and the deep-sea motor 1 directly drives the seawater pump 3. The seawater in the main water tank passes through the hydraulic control stop valve D1 to the inlet chamber of the seawater pump 3, and is injected into the stern water tank through the hydraulic control stop valve E1 by the seawater pump outlet chamber, so that the amount of water in the stern main water tank increases and the amount of water in the bow main water tank decreases, the front and rear buoyancy relationship changes, and the center of gravity adjustment of the submersible is completed.

[0030] See also Figure 3 The hydraulic control stop valve includes a hydraulic control valve upper end cover 13, a hydraulic control valve spool 14, a hydraulic control valve spring 15, a hydraulic control valve sleeve 16, a piston bracket 17, a hydraulic control valve housing 18, a hydraulic control valve piston 19, a hydraulic control valve lower end cover 20, an inlet cavity 21, an outlet cavity 22, a sea cavity 23, and a hydraulic control cavity 24; the hydraulic control valve piston 19 is provided with a hydraulic control cavity 23 and a sea cavity 24, the hydraulic control valve housing 18 is provided with an inlet cavity 21 and an outlet cavity 22, the hydraulic control cavity 23 is connected to the hydraulic control port, and the sea cavity 24 connects the inlet and outlet ends of the seawater connection port, the inlet end of the seawater connection port connects to the inlet chamber 121, and the outlet end of the seawater connection port connects to the outlet chamber 122. The hydraulic control valve piston 19 is installed with the piston bracket through the grid ring to isolate the hydraulic control chamber 23 below it from the sea-connecting chamber 24 above it; the upper part of the hydraulic control valve spring 15 abuts against the lower part of the hydraulic control valve upper end cover 13 and acts on the hydraulic control valve spool 14, so that the hydraulic control valve spool 14 contacts the hydraulic control valve sleeve 16 to separate the inlet chamber 21 and the outlet chamber 22.

[0031] The hydraulically controlled stop valve is a core component in a buoyancy control device. During buoyancy control, its opening and closing logic must be controlled to manage the device's filling, draining, and water regulation. This requires high sealing and flow capacity. The stop valves used in traditional buoyancy control devices are typically electromagnetic stop valves, which rely on an electromagnet to overcome spring force to push the valve core open, offering fast response. However, the solenoid's thrust significantly limits the flow area of ​​the valve opening. A larger valve opening's flow area requires a higher sealing pressure, increasing the force required to open the valve core. Therefore, high-flow buoyancy control devices require a significantly larger valve opening area to improve flow capacity. At the same depth, a larger valve opening's flow area requires a higher driving force to open it, necessitating the use of hydraulic pressure to open it.

[0032] The hydraulic control valve upper end cover 13 and the hydraulic control valve lower end cover 20 are connected to the hydraulic control valve housing 18 via bolts. The hydraulic control valve sleeve 16 is installed in the hydraulic control valve housing 18, with its upper portion abutting against the hydraulic control valve upper end cover 13. The hydraulic control valve spool 14 is installed in the hydraulic control valve sleeve 16, with its lower portion abutting against the hydraulic control valve sleeve 16. The hydraulic control valve spring 15 is disposed within the hydraulic control valve spool 14. The piston bracket 17 is installed in the hydraulic control valve housing 18, with its lower portion abutting against the hydraulic control valve lower end cover 24. The hydraulic control valve piston 19 is installed in the piston bracket 17, with its upper portion proximate to the hydraulic control valve spool 14. The contact seal between the hydraulic control valve spool 14 and the hydraulic control valve sleeve 16 isolates the inlet chamber 21 and outlet chamber 22 of the hydraulic control stop valve. The pressure in outlet chamber 122 communicates with the volume above the hydraulic control valve core 14 through two small holes in the hydraulic control valve core 14. This pressure acts on the hydraulic control valve core 14, pressing the hydraulic control valve core 14 against the hydraulic control valve sleeve 16. This prevents outlet chamber 122 from being dislodged by the pressure of the sea depth, thereby opening the hydraulic control stop valve. The piston bracket 17 is installed in the lower center of the hydraulic control valve housing 18, abutting against the hydraulic control valve lower end cover 20. The hydraulic control valve piston 19 is installed in the piston bracket 17, with its upper portion close to the hydraulic control valve core 14. The piston 19 is attached to the piston bracket 17 via a Gly ring, isolating the hydraulic control chamber 24 below it from the sea-access chamber 23 above it. The sealing ring on the piston bracket 17 also isolates the sea-access chamber from the outlet chamber 122. The sea-access chamber is directly connected to the external marine environment through a hole in the valve housing. As the hydraulic control valve piston 19 moves upward, it discharges seawater above the piston bracket 17 into the marine environment.

[0033] The hydraulic control valve spring 15 abuts against the bottom of the hydraulic control valve upper end cover 13, acting on the hydraulic control valve spool 14, causing the spool 14 to contact the hydraulic control valve sleeve 16, isolating the inlet chamber 21 from the outlet chamber 22. When the hydraulic control stop valve needs to be opened, high-pressure oil is passed into the hydraulic control chamber. Under the action of this pressure, the hydraulic control valve piston 19 moves upward, contacts the hydraulic control valve spool 14, and pushes the hydraulic control valve spool 14 open, thus connecting the inlet chamber 21 with the outlet chamber 22. When the hydraulic control stop valve needs to be closed, the hydraulic control chamber connects to the pressure relief oil circuit, and the hydraulic control valve piston 19 loses its pressure. The spring force pushes the hydraulic control valve spool 14 and the hydraulic control valve piston 19 downward, causing the hydraulic control valve spool 14 to contact the hydraulic control valve sleeve 16, forming a seal.

[0034] As the core component, the hydraulically controlled stop valve controls the connection and cutoff of the waterway. Different hydraulically controlled stop valves are opened under different working conditions, and other hydraulically controlled stop valves remain closed, allowing water to be discharged from the main water tank to the marine environment, injected from the marine environment into the main water tank, or from the main water tank to the main water tank of the stern system according to the required working conditions, thereby realizing the buoyancy / trimming adjustment of the submersible.

[0035] The solenoid shutoff valve is equipped with three chambers: a first inlet chamber, a second inlet chamber, and an outlet chamber. The second inlet chamber is connected to the accumulator and the high-pressure oil circuit, while the second inlet chamber is connected to the low-pressure oil circuit. The outlet chamber of each solenoid shutoff valve is connected to the hydraulic control chamber of the corresponding hydraulic shutoff valve. When the solenoid shutoff valve is de-energized, the second inlet chamber communicates with the outlet chamber, at which point the hydraulic control chamber of the hydraulic shutoff valve communicates with the low-pressure oil pipeline via the solenoid shutoff valve. When the solenoid shutoff valve is energized, the first inlet chamber communicates with the outlet chamber, at which point the hydraulic control chamber of the hydraulic shutoff valve communicates with the accumulator and the high-pressure oil pipeline via the solenoid shutoff valve.

[0036] The accumulator has an interface that connects to the control high-pressure oil circuit and the inlet chamber of the electromagnetic shutoff valve assembly. During operation, the accumulator is typically filled to high pressure via the control high-pressure oil circuit. Specifically, the high-pressure oil circuit is connected to the hydraulic pump's discharge chamber via the control oil circuit P, while the low-pressure oil circuit connects to the accumulator and to the hydraulic pump's suction chamber via the pressure relief oil circuit T, thereby controlling the high-pressure oil. When the hydraulic shutoff valve needs to be opened during operation, the high-pressure oil in the accumulator can be directly used, eliminating the need for an external hydraulic system to provide high-pressure hydraulic oil. This results in low vibration and low noise.

[0037] This device includes a safety valve, a controller and a sensor. The inlet of the safety valve is connected to the outlet of the seawater motor pump, and the outlet of the safety valve is connected to the inlet of the hydraulic control stop valve group and the seawater motor pump group. The sensors include a pressure sensor and a temperature sensor. The pressure and temperature information transmitted by the pressure sensor and the temperature sensor is sent to the controller, thereby controlling the operation of the hydraulic control stop valve group, the electromagnetic stop valve group and the seawater motor pump group respectively.

[0038] This device has the characteristics of low vibration and low noise, high flow capacity and high reliability. At the same time, by arranging one set at the bow and stern, it can realize the mutual rapid water transfer of the bow and stern water tanks to achieve longitudinal adjustment, and is suitable for buoyancy adjustment of large-tonnage underwater vehicles.

[0039] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A large-tonnage buoyancy and trim adjustment device for deep-sea distributed control, characterized in that: It includes a seawater motor pump group, an electromagnetic stop valve group and a hydraulic control stop valve group. The hydraulic control stop valve group includes multiple hydraulic control stop valves, each of which is provided with a hydraulic control port and a seawater connection port. The electromagnetic stop valve group includes electromagnetic stop valves corresponding to the hydraulic control stop valves. Each electromagnetic stop valve is provided with a first inlet cavity, a second inlet cavity and an outlet cavity. The first inlet cavity is connected to the accumulator and the high-pressure oil circuit, the second inlet cavity is connected to the low-pressure oil circuit, and the outlet cavity of each electromagnetic stop valve is connected to the hydraulic control cavity of the corresponding hydraulic control stop valve. The electromagnetic stop valve is used to control the high-pressure oil in the high-pressure oil circuit. The flow to the hydraulic control chamber is turned on and off, and the hydraulic control stop valve is opened and closed under the drive of high-pressure oil, wherein the seawater connection port of one group of hydraulic control stop valves is connected to the inlet of the seawater motor pump group and the sea interface, the seawater connection port of one group of hydraulic control stop valves is connected to the outlet of the seawater motor pump group and the sea interface, the seawater connection port of one group of hydraulic control stop valves is connected to the inlet of the seawater motor pump group and the water tank interface of the main water tank, the seawater connection port of one group of hydraulic control stop valves is connected to the outlet of the seawater motor pump group and the water tank interface of the main water tank, and another group is connected to the outlet of the seawater motor pump group and the interface of another buoyancy and trim adjustment device.

2. A large-tonnage buoyancy and trim adjustment device for deep-sea distributed control according to claim 1, characterized in that: The hydraulically controlled stop valve group includes a hydraulically controlled stop valve A1, a hydraulically controlled stop valve C1, a hydraulically controlled stop valve B1, a hydraulically controlled stop valve D1 and a hydraulically controlled stop valve E1. The seawater connection outlet ends of the hydraulically controlled stop valve C1 and the hydraulically controlled stop valve D1 are connected to the inlet of the seawater motor pump group, and the seawater connection inlet ends of the hydraulically controlled stop valve A1, the hydraulically controlled stop valve B1 and the hydraulically controlled stop valve E1 are connected to the outlet of the seawater motor pump group. The seawater connection outlet end of the hydraulically controlled stop valve A1 and the seawater connection inlet end of the hydraulically controlled stop valve C1 are connected to the sea connection interface through a filter; the seawater connection outlet end of the hydraulically controlled stop valve B1 and the seawater connection inlet end of the hydraulically controlled stop valve D1 are connected to the water tank interface of the main water tank for water filling and drainage; the seawater connection outlet end of the hydraulically controlled stop valve E1 is connected to the interface of another buoyancy and trim adjustment device for water regulation.

3. A large-tonnage buoyancy and trim adjustment device for deep-sea distributed control according to claim 1, characterized in that: The seawater motor pump group includes a deep-sea motor, a seawater pump and a vibration isolation bracket. The deep-sea motor and the seawater pump are installed on the vibration isolation bracket. The seawater pump is connected to the hydraulically controlled stop valve group through a seawater pump outlet connecting hose and a seawater pump inlet hose respectively.

4. A large-tonnage buoyancy and trim adjustment device for deep-sea distributed control according to claim 3, characterized in that: The hydraulically controlled stop valve includes an upper end cover of the hydraulically controlled valve, a hydraulically controlled valve spool, a hydraulically controlled valve sleeve, a hydraulically controlled valve housing and a lower end cover of the hydraulically controlled valve. The upper end cover of the hydraulically controlled valve and the lower end cover of the hydraulically controlled valve are connected to the hydraulically controlled valve housing by bolts. The hydraulically controlled valve sleeve is installed in the hydraulically controlled valve housing and abuts against the upper end cover of the hydraulically controlled valve at the top. The hydraulically controlled valve spool is installed in the hydraulically controlled valve sleeve and abuts against the hydraulically controlled valve sleeve at the bottom.

5. A large-tonnage buoyancy and trim adjustment device for deep-sea distributed control according to claim 4, characterized in that: The hydraulically controlled stop valve also includes a hydraulically controlled valve spring, a piston bracket and a hydraulically controlled valve piston. The hydraulically controlled valve spring is arranged in the hydraulically controlled valve spool. The piston bracket is installed in the lower middle part of the hydraulically controlled valve housing and abuts against the lower end cover of the hydraulically controlled valve. The hydraulically controlled valve piston is installed in the piston bracket and is close to the hydraulically controlled valve spool at the top.

6. A large-tonnage buoyancy and trim adjustment device for deep-sea distributed control according to claim 5, characterized in that: A hydraulic control chamber and a sea-connecting chamber are provided in the hydraulic control valve piston, and an inlet chamber 1 and an outlet chamber 1 are provided on the hydraulic control valve housing. The hydraulic control chamber is connected to the hydraulic control port, and the sea-connecting chamber is connected to the inlet end and the outlet end of the seawater connection port. The inlet end of the seawater connection port is connected to the inlet chamber 1, and the outlet end of the seawater connection port is connected to the outlet chamber 1. The hydraulic control valve piston is installed with a grid ring and a piston bracket to isolate the hydraulic control chamber below it from the sea-connecting chamber above it; the upper part of the hydraulic control valve spring is against the lower part of the hydraulic control valve upper end cover to act on the hydraulic control valve spool, so that the hydraulic control valve spool and the hydraulic control valve valve sleeve are in contact to separate the inlet chamber 1 and the outlet chamber 1.

7. A large-tonnage buoyancy and trim adjustment device for deep-sea distributed control according to any one of claims 1 to 6, characterized in that: The high-pressure oil circuit and the low-pressure oil circuit are connected to an oil pressure pump, and the oil pressure pump is connected to an accumulator.

8. A large-tonnage buoyancy and trim adjustment device for deep-sea distributed control according to claim 6, characterized in that: It comprises a safety valve, the inlet of the safety valve is connected to the outlet of the seawater motor pump, and the outlet of the safety valve is connected to the hydraulic control stop valve group and the inlet of the seawater motor pump group.

9. A large-tonnage buoyancy and trim adjustment device for deep-sea distributed control according to claim 8, characterized in that: It also includes a controller and sensors, which include pressure sensors and temperature sensors. The pressure and temperature information transmitted by the pressure sensor and temperature sensor are sent to the controller, thereby controlling the operation of the hydraulic control stop valve group, the electromagnetic stop valve group, and the seawater motor pump group respectively.

10. A large-tonnage buoyancy and trim adjustment device for deep-sea distributed control according to claim 9, characterized in that: At least one set of the buoyancy and trim adjustment device is provided, and is located at the bow and / or stern of the vessel. When the bow and stern of the vessel are each provided with a set of the buoyancy and trim adjustment device, they are used to perform mutual water adjustment.

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