Ship buoyancy adjusting device

Abstract

The invention relates to a ship buoyancy adjusting device which comprises a filter, a near-water-end two-way electric ball valve, a four-way electric ball valve, a water pump, a two-way flow meter, a water ballast space, a near-cabin-end two-way electric ball valve and a one-way valve. One end of the filter is communicated with outboard, and the other end of the filter is connected with one end of the water inlet end two-way electric ball valve; the other end of the near-water-end two-way electric ball valve is simultaneously connected with a D port of the four-way electric ball valve and one end of the throttling bypass; a port A of the four-way electric ball valve is communicated with a high-pressure port of the water pump through a one-way valve, a port C of the four-way electric ball valve is communicated with a low-pressure port of the water pump, a port B of the four-way electric ball valve and the other end of the throttling bypass are simultaneously communicated with one end of the bidirectional flowmeter, and the other end of the bidirectional flowmeter is communicated with the water ballast space. The buoyancy adjusting device is wide in buoyancy adjusting range, light in weight and small in energy consumption.

Description

Technical Field

[0001] This invention belongs to the field of marine technology and relates to a variable buoyancy system on ships, specifically a ship buoyancy adjustment device. Background Technology

[0002] Buoyancy adjustment devices can significantly improve a ship's maneuverability, endurance, and adaptability to environmental changes. The seawater hydraulic power-ballast tank type buoyancy adjustment device uses a water pump to fill and drain the ballast tank, and a valve assembly to switch the direction of filling and draining. It has the advantages of a wide buoyancy adjustment range, simple principle, small size, and light weight.

[0003] The axial piston pumps commonly used do not have bidirectional operating capability, often requiring four two-position two-way valves to switch the injection and drainage directions. Furthermore, under high pressure, the pressure difference between the inlet and outlet of these two-position two-way valves is extremely large, resulting in a high output torque requirement for the electric actuator, which limits the size and weight of the actuator. These factors severely hinder the integration and lightweighting of the buoyancy adjustment device. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention proposes a ship buoyancy adjustment device that is simple in principle, compact in structure, lightweight and low in energy consumption.

[0005] The above-mentioned objective of this invention is achieved through the following technical solution: A ship buoyancy adjustment device includes a filter, a near-water two-way electric ball valve, a four-way electric ball valve, a water pump, a two-way flow meter, a ballast water tank, a near-water two-way electric ball valve, and a check valve; One end of the filter is connected to the outside of the ship, and the other end of the filter is connected to one end of the inlet two-way electric ball valve; the other end of the near-water two-way electric ball valve is simultaneously connected to port D of the four-way electric ball valve and one end of the throttling bypass; port A of the four-way electric ball valve is connected to the high-pressure port of the water pump via a check valve, port C of the four-way electric ball valve is connected to the low-pressure port of the water pump, port B of the four-way electric ball valve and the other end of the throttling bypass are simultaneously connected to one end of the bidirectional flow meter, and the other end of the bidirectional flow meter is connected to the ballast water tank via the near-cabin two-way electric ball valve; the filter, the near-water two-way electric ball valve, the four-way electric ball valve, the water pump, the check valve, the bidirectional flow meter, the near-cabin two-way electric ball valve, and the ballast water tank are connected by pipelines to form a pumping water circuit for water injection and drainage; The water injection methods of the ship buoyancy adjustment device include pumped water injection, throttling bypass pumpless gravity water injection, and a combination of pumped and pumpless gravity water injection. When pumping water is used, before the water pump is turned on, the pressure at each port of the four-way electric ball valve is balanced by the throttling bypass to achieve no pressure difference when the four-way electric ball valve is switched, thereby reducing the output torque of the electric actuator of the four-way electric ball valve; then the throttling bypass is closed, and finally the water pump is turned on. Moreover, a pressure transmitter, a bypass two-way electric ball valve, and a throttling device are installed in series on the throttling bypass.

[0006] Furthermore, a pressure transmitter, a bypass two-way electric ball valve, and a throttling device are installed in series on the throttling bypass.

[0007] Moreover, the throttling bypass adopts a multi-path parallel form or an electric regulating form.

[0008] Furthermore, multiple pumping water path branches are connected in parallel between the near-water two-way electric ball valve and the bidirectional flow meter, and a four-way electric ball valve, a water pump and a one-way valve are connected in series on each pumping water path branch.

[0009] The advantages and positive effects of this invention are as follows: 1. The four-way electric ball valve of the ship buoyancy adjustment device of the present invention integrates the functions of four two-position two-way valves, making the buoyancy adjustment device more compact and lighter.

[0010] 2. The ship buoyancy adjustment device of the present invention can achieve zero pressure difference when switching four-way electric ball valves through throttling bypass, and the size and weight of electric actuator are greatly reduced, thus reducing energy consumption.

[0011] 3. The ship buoyancy adjustment device of the present invention can realize three water injection methods: pumped water injection, pumpless gravity water injection, and a combination of pumped and pumpless gravity water injection. It has the advantages of wide buoyancy adjustment range, simple principle, compact structure, light weight and low energy consumption. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the drainage principle of the ship buoyancy adjustment device of the present invention; Figure 2 This is a schematic diagram of the water injection principle of the buoyancy adjustment device of the present invention; Figure 3 This is a schematic diagram of the structure of the present invention, which employs multiple pumping water path branches and multiple throttling bypasses. Detailed Implementation

[0013] The structure of the present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that these embodiments are descriptive and not limiting.

[0014] A ship buoyancy adjustment device, please refer to Figures 1-3The invention is based on the following components: a filter 1, a two-way electric ball valve, a four-way electric ball valve 3, a water pump 4, a throttling device 5, a pressure transmitter 6, a bidirectional flow meter 7, a ballast water tank 8, and a one-way valve 9. The two-way electric ball valve includes a near-water two-way electric ball valve 2, a bypass two-way electric ball valve, and a near-tank two-way electric ball valve.

[0015] One end of the filter 1 is connected to the outside of the ship, and the other end of the filter 1 is connected to one end of the inlet two-way electric ball valve. The other end of the near-water two-way electric ball valve 2 is simultaneously connected to port D of the four-way electric ball valve 3 and one end of the throttling bypass. Port A of the four-way electric ball valve 3 is connected to the high-pressure port of the water pump 4 via a check valve, wherein the conduction direction of the check valve is from the high-pressure port of the water pump 4 to port A of the four-way electric ball valve 3. Port C of the four-way electric ball valve 3 is connected to the low-pressure port of the water pump 4. Port B of the four-way electric ball valve 3 and the other end of the throttling bypass are simultaneously connected to one end of the bidirectional flow meter 7. The other end of the bidirectional flow meter 7 is connected to the ballast water tank 8 via the near-tank two-way electric ball valve.

[0016] The aforementioned filter, near-water two-way electric ball valve, four-way electric ball valve, water pump, check valve, bidirectional flow meter, near-cabin two-way electric ball valve, and ballast water tank are connected by pipelines to form a pumping water circuit for water injection and drainage.

[0017] The aforementioned throttling bypass can be configured in multiple parallel connections or electrically regulated to suit different operating conditions. In this invention, it is preferable to install a pressure transmitter, a two-way electric ball valve, and a throttling device in series on each throttling bypass.

[0018] The throttling bypass has a pump-free gravity-flow water injection function and can balance the pressure at each port of the four-way electric ball valve 3. There is no pressure difference when the four-way electric ball valve 3 switches, significantly reducing the output torque requirement of its electric actuator. The buoyancy adjustment device of this invention can use a pumped water path for water injection and drainage, or it can use a throttling bypass for pump-free water injection. Specifically, three methods can be selected for injecting water into the ballast water tank: Water injection method 1: Water is injected through the pumping water circuit. Before the water pump is turned on, the pressure at each port of the four-way electric ball valve is balanced by the throttling bypass to achieve no pressure difference when the four-way electric ball valve is switched. Then the throttling bypass is closed, and finally the water pump is turned on.

[0019] Water injection method 2: Water injection without pump can be achieved by using a throttling bypass when the water pump is not running; Water injection method three: A combination of pump water injection and throttling bypass water injection is used. In this case, both the pump water circuit and the throttling bypass water circuit are in a closed state.

[0020] The ship buoyancy adjustment device of this invention can switch the direction of ballast water tank injection and drainage by switching the four ports of a four-way electric ball valve. The specific methods for pumping drainage and injection are as follows: When ports A and D of the four-way electric ball valve 3 are connected, and ports B and C are connected, after the water pump starts, the water in the ballast tank 8 passes through the near-tank two-way electric ball valve and the bidirectional flow meter, then enters the corresponding passage inside the four-way electric ball valve through port B, and then flows out through port C. It then enters the water pump through the low-pressure port of the water pump 4, and is output from the high-pressure port of the water pump. The output water passes through a check valve, then enters the corresponding passage inside the four-way electric ball valve again through port A of the four-way electric ball valve 3, and then flows out through port D. The water flowing out from port D passes through the near-water end two-way electric ball valve and the filter, and is finally discharged into the water body of the ship's environment. See [link to relevant documentation]. Figure 1 .

[0021] When ports A and B of the four-way electric ball valve 3 are connected, and ports D and C are connected, after the water pump is started, the water in the ship's environment passes through the filter and the near-water two-way electric ball valve, then enters the corresponding passage inside the four-way electric ball valve through port D of the four-way electric ball valve 3, and then flows out through port C. It enters the water pump through the low-pressure port of the water pump 4 and is output from the high-pressure port of the water pump. The output water passes through the check valve, then through port A of the four-way electric ball valve 3, and re-enters the corresponding passage inside the four-way electric ball valve. It then flows out through port B of the four-way electric ball valve. The water flowing out from port B passes through the bidirectional flow meter and the near-tank two-way electric ball valve and enters the ballast water tank 8, thereby filling the ballast water tank 8 with water.

[0022] The buoyancy adjustment device of this invention uses three two-way electric ball valves and a one-way valve at the outlet of the water pump 4 to form a three-layer defense line in front of the ballast water tank 8, effectively preventing seawater from leaking into the ballast water tank 8.

[0023] To meet the water injection and drainage needs within a wide flow range of the pumping water path, multiple pumping water path branches can be connected in parallel between the two-way electric ball valve and the bidirectional flow meter at the near-water end. On each pumping water path branch, a four-way electric ball valve, a water pump, and a check valve are connected in series.

[0024] Although embodiments and drawings of the present invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A ship buoyancy adjustment device, characterized in that: Includes filters, near-water two-way electric ball valves, four-way electric ball valves, water pumps, bidirectional flow meters, ballast water tanks, near-tank two-way electric ball valves, and check valves; One end of the filter is connected to the outside of the ship, and the other end of the filter is connected to one end of the inlet two-way electric ball valve; the other end of the near-water two-way electric ball valve is simultaneously connected to port D of the four-way electric ball valve and one end of the throttling bypass; port A of the four-way electric ball valve is connected to the high-pressure port of the water pump via a check valve, port C of the four-way electric ball valve is connected to the low-pressure port of the water pump, port B of the four-way electric ball valve and the other end of the throttling bypass are simultaneously connected to one end of the bidirectional flow meter, and the other end of the bidirectional flow meter is connected to the ballast water tank via the near-cabin two-way electric ball valve; the filter, the near-water two-way electric ball valve, the four-way electric ball valve, the water pump, the check valve, the bidirectional flow meter, the near-cabin two-way electric ball valve, and the ballast water tank are connected by pipelines to form a pumping water circuit for water injection and drainage; The water injection methods of the ship buoyancy adjustment device include pumped water injection, throttling bypass pumpless gravity water injection, and a combination of pumped and pumpless gravity water injection. When pumping water is used, before starting the water pump, the pressure at each port of the four-way electric ball valve is balanced by the throttling bypass to achieve zero pressure difference when the four-way electric ball valve is switched, thereby reducing the output torque of the electric actuator of the four-way electric ball valve; then the throttling bypass is closed, and finally the water pump is started.

2. The ship buoyancy adjustment device according to claim 1, characterized in that: A pressure transmitter, a two-way electric ball valve, and a throttling device are connected in series on the throttling bypass.

3. The ship buoyancy adjustment device according to claim 1, characterized in that: The throttling bypass adopts a multi-path parallel form or an electric regulating form.

4. The ship buoyancy adjustment device according to claim 1, characterized in that: Multiple pumping water path branches are connected in parallel between the near-water two-way electric ball valve and the bidirectional flow meter. A four-way electric ball valve, a water pump and a one-way valve are connected in series on each pumping water path branch.

Images