Marine negative pressure type seawater tank degassing device

Abstract

The invention relates to a marine negative pressure type seawater tank degassing device which comprises a seawater tank, the top of the seawater tank is connected with a plurality of air suction branch pipes, the plurality of air suction branch pipes are converged into an air suction pipe, and the air suction pipe is obliquely and forwards communicated with the side wall of a seawater chord outer discharge pipe; the seawater chord external discharge pipeline is powered by a seawater power device; and the pipe diameter of the air suction pipe is smaller than that of the seawater chord discharge pipe. Through micro negative pressure drainage of the air branch pipeline, air bubbles entering the seawater tank are sucked and discharged to the outboard, the air bubbles are prevented from entering a water system, the design is very ingenious, a pipeline system is slightly changed, and application and popularization are very convenient.

Description

Technical Field

[0001] The invention relates to a marine negative pressure seawater tank degassing device, belonging to the technical field of ship design. Background Art

[0002] Air bubbles will inevitably enter and accumulate in the ship's seawater tank, such as Figure 1 As shown, the existing design only sets a ventilation pipe on the top of the seawater tank and removes air bubbles in a natural way through the ventilation pipe. The air bubble removal effect is not ideal. A large number of air bubbles still enter the water system with the water flow, thereby affecting the reliability and effectiveness of the operation of pumps and other equipment in the system. Summary of the invention

[0003] The purpose of the present invention is to provide a marine negative pressure seawater tank degassing device. Through special design, the ejector principle of the outboard drainage pipeline of the original seawater cooling system is utilized. By setting a connecting branch pipe between the drainage pipeline and the seawater tank, a certain micro-negative pressure is generated on the top of the seawater tank, and the air bubbles gathered on the top of the seawater tank are discharged. The negative pressure causes the air bubbles in the seawater flow to precipitate in advance, which can effectively prevent the air bubbles from entering the water use system with the seawater flow, optimize the use of the system, and extend the life of the equipment.

[0004] The present invention adopts the following technical solutions:

[0005] A marine negative pressure seawater tank degassing device comprises a seawater tank 1, wherein a plurality of air intake branches 2 are connected to the top of the seawater tank 1, wherein the plurality of air intake branches 2 are gathered into an air intake pipe 5, wherein the air intake pipe 5 is connected to the side wall of a seawater chord discharge pipe 6 at an angle forward; the seawater chord discharge pipe is powered by a seawater power device; and the diameter of the air intake pipe 5 is smaller than that of the seawater chord discharge pipe 6.

[0006] In the present technical solution, the setting of the air suction pipe 5 actually provides a structure similar to an ejector, which provides a slight negative pressure and uses the slight negative pressure method to remove air bubbles, thereby greatly speeding up the bubble removal process compared to existing bubble removal methods.

[0007] Preferably, the seawater power device is a seawater pump 4, which pumps seawater to the equipment to be cooled on the ship, and then discharges it to the chord side through the seawater chord discharge pipe 6. This technical solution utilizes the original seawater discharge pipeline and seawater pump, without excessive modification of the system, but cleverly arranges the air intake branch pipe 2 and the air intake pipe 5 at appropriate positions, so as to generate an ejector effect, thereby establishing a slight negative pressure, and accelerating the speed of removing bubbles in the seawater tank.

[0008] Furthermore, the front end of the seawater pump 4 is also provided with a branch pipeline 7 leading to other water-using equipment.

[0009] Preferably, the top of the seawater tank 1 is also provided with a natural ventilation pipe 3 passing through the top of the main deck.

[0010] Furthermore, the diameter of the seawater discharge pipe 6 is reduced to be smaller than the pipes connected to the two ends of the seawater pump 4. This technical solution changes the diameter of the existing seawater discharge pipe (appropriately reduces it), thereby increasing the seawater discharge flow rate and enhancing the injection effect.

[0011] Preferably, a stop valve and a solenoid valve are provided at a position before the seawater discharge pipe 6 is connected to the air intake pipe 5, and the opening and closing of the seawater discharge pipe 6 can be controlled by manual and electromagnetic remote control, thereby determining whether to start the function of accelerating the removal of bubbles in the seawater tank.

[0012] The beneficial effects of the present invention are:

[0013] 1) Through the micro-negative pressure drainage of the air branch pipeline, the air bubbles entering the seawater tank are sucked in and discharged to the overboard, preventing the air bubbles from entering the water system. The design is very clever, and the changes to the original pipeline system are very small, which is very convenient for promotion and application;

[0014] 2) Improve the working condition of water system equipment;

[0015] 3) Reduce the risk of cavitation of water pumps and increase their service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a design drawing of an existing traditional seawater tank ventilation pipeline.

[0017] Figure 2 It is a structural schematic diagram of a marine negative pressure seawater tank degassing device of the present invention.

[0018] In the figure, 1. seawater tank, 2. air intake branch pipe, 3. natural ventilation pipe, 4. seawater pump, 5. air intake pipe, 6. seawater discharge pipe, 7. branch pipes leading to other water-using equipment. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] See attached Figure 1First, the main disadvantage of the prior art is that it cannot effectively and timely remove the air bubbles entering the seawater tank, which eventually causes the air bubbles to gather and grow larger and then enter the water system with the seawater flow, thereby affecting the effectiveness of the water system and the reliability of the equipment. The purpose of the present invention is to effectively remove the air bubbles in the seawater flow in the seawater tank, so that the number of air bubbles entering the water system is as small as possible, thereby improving the effectiveness of the water system and the reliability of the equipment and extending the service life of the equipment. The specific scheme is described as follows:

[0021] See also Figure 2 A marine negative pressure seawater tank degassing device comprises a seawater tank 1, wherein a plurality of air intake branches 2 are connected to the top of the seawater tank 1, wherein the plurality of air intake branches 2 are gathered into an air intake pipe 5, wherein the air intake pipe 5 is connected to the side wall of a seawater chord discharge pipe 6 at an angle forward; the seawater chord discharge pipe is powered by a seawater power device; and the diameter of the air intake pipe 5 is smaller than that of the seawater chord discharge pipe 6.

[0022] The setting of the air suction pipe 5 actually provides a structure similar to an ejector, which provides a slight negative pressure and uses the slight negative pressure method to remove air bubbles, thereby greatly accelerating the speed of removing bubbles compared to the existing bubble removal method.

[0023] In this embodiment, see Figure 2 The seawater power device is a seawater pump 4, which pumps seawater to the equipment to be cooled on the ship, and then discharges it to the chord side through the seawater chord discharge pipe 6. This solution uses the original seawater discharge pipeline and seawater pump, without too much modification of the system. The seawater pump 4 and other pipelines are all original equipment, but the air intake branch pipe 2 and the air intake pipe 5 are cleverly set at appropriate positions, so as to produce an ejector effect, thereby establishing a slight negative pressure, thereby accelerating the speed of removing bubbles in the seawater tank.

[0024] In this embodiment, the front end of the seawater pump 4 also has a branch pipeline 7 leading to other water-using equipment.

[0025] In another embodiment, a natural air permeable pipe 3 passing through the top of the main deck is also provided on the top of the seawater tank 1.

[0026] In this embodiment, the diameter of the seawater discharge pipe 6 is reduced to be smaller than the pipes connected to the two ends of the seawater pump 4. This solution changes the diameter of the existing seawater discharge pipe (appropriately reduces it), thereby increasing the seawater discharge flow rate and enhancing the jet effect.

[0027] In this embodiment, a stop valve and a solenoid valve are provided at the position of the seawater discharge pipe 6 before the connection with the air intake pipe 5, and the opening and closing of the seawater discharge pipe 6 can be controlled by manual and electromagnetic remote control, thereby determining whether to start the function of accelerating the removal of bubbles in the seawater tank.

[0028] The present invention adopts the ejector principle, arranges an air suction branch pipeline on the outboard discharge pipeline of the seawater cooling system, connects the air suction branch pipeline to the top of the seawater tank, utilizes the ejection suction force generated by the high-speed water flow in the discharge pipeline, sucks the precipitated air on the top of the seawater tank through the air branch pipeline, and generates a certain micro-negative pressure on the top of the seawater tank, further promotes the precipitation of air bubbles in the seawater, thereby reducing the air bubbles in the seawater flow.

[0029] Detailed design and layout based on the principle: By reducing the diameter of the outlet section of the seawater system's overboard discharge pipe, the velocity of the discharged water flow is increased, the jet effect is improved, and the suction force in the air branch pipe is increased. An air branch pipe is set on the discharge pipe and connected to the top of the seawater tank. According to the area and structure of the seawater tank top plate, multiple small branches are set to suck in the air bubbles gathered on the top, and a certain micro-negative pressure is generated on the surface of the seawater inside the seawater tank, which promotes the further precipitation of air bubbles in the seawater. The precipitated air bubbles are finally discharged to the overboard together with the seawater in the seawater overboard discharge pipe.

[0030] In summary, the present invention uses the micro-negative pressure drainage of the air branch pipeline to suck in the air bubbles entering the seawater tank and discharge them overboard, thereby preventing the air bubbles from entering the water use system. The design is very clever, and the change to the original piping system is very small, so it is very convenient to promote and apply; it improves the working condition of the water system equipment; reduces the cavitation risk of the water pump and increases the service life.

[0031] The above are preferred embodiments of the present invention. A person skilled in the art may make various changes or improvements on this basis. Without departing from the general concept of the present invention, these changes or improvements should fall within the scope of protection claimed by the present invention.

Claims

1. A negative pressure seawater tank degassing device for a ship, comprising a seawater tank (1), Features: The top of the seawater tank (1) is connected to a plurality of air intake branch pipes (2), the plurality of air intake branch pipes (2) are combined into one air intake pipe (5), and the air intake pipe (5) is connected to the side wall of the seawater discharge pipe (6) at an angle forward; The seawater discharge pipeline is powered by a seawater power device; The diameter of the air intake pipe (5) is smaller than the seawater discharge pipe (6).

2. The marine negative pressure seawater tank degassing device according to claim 1, Features: The seawater power device is a seawater pump (4), which pumps seawater to the equipment on board that needs to be cooled, and then discharges the seawater to the chord side through the seawater chord discharge pipe (6).

3. The marine negative pressure seawater tank degassing device according to claim 2, Features: The front end of the seawater pump (4) is also provided with a branch pipeline (7) leading to other water-using equipment.

4. The marine negative pressure seawater tank degassing device according to claim 1, Features: The top of the seawater tank (1) is also provided with a natural ventilation pipe (3) passing through the top of the main deck.

5. The marine negative pressure seawater tank degassing device according to claim 2, Features: The diameter of the seawater discharge pipe (6) is reduced to be smaller than the pipes connected to the two ends of the seawater pump (4).

6. The marine negative pressure seawater tank degassing device according to claim 1, Features: The seawater discharge pipe (6) is provided with a stop valve and a solenoid valve at a position before the connection with the air intake pipe (5).

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