KR200491438Y1 - Underwater Exhaust Pipe of Ship - Google Patents

Abstract

The present invention relates to an underwater exhaust pipe of a ship so that the exhaust gas generated during the operation of the ship is discharged into the water (sea water), and at the same time, the exhaust gas is easily discharged and the structure can be simplified.
The present invention is an underwater exhaust pipe 120 provided in the stern 101 to discharge exhaust gas generated from the engine 110 inside the vessel 100 into the water outside the vessel 100, the underwater exhaust pipe 120 ) Is provided to protrude from the inside of the stern portion 101 to the outside of the ship, and an end portion of the underwater exhaust pipe 120 is formed with a cutout portion 121a formed in a portion to smoothly discharge the exhaust gas by reducing the pressure. It is formed of a scoop (121).

Description

Underwater Exhaust Pipe of Ship

The present invention relates to an underwater exhaust pipe of a ship, and discharges the exhaust gas generated during the operation of the ship into the water (sea water), and at the same time, facilitates the exhaust of the exhaust gas and simplifies the structure.

In general, various ships (eg, FLNG, FPSO, etc.) generate exhaust gas by operating an engine (diesel engine) during operation. An exhaust pipe for discharging such exhaust gas to the outside of the hull should be formed.

Attached Exemplary Drawing FIG. 1 is a side view showing a stern portion of a conventional ship, in which an engine room 10 is located below the stern portion, and an upper deck 11 is positioned above the engine room 10. The residence 12 inhabited by the ship's embarkators is located on the upper deck 11.

The residence 12 is located at the top and includes a wheel house 13 in which the ship's traveling direction is controlled, and is extended to the stern from where the stern side bulkhead of the cargo hold 15 located at the rear end is located. do.

On the upper part of the wheel house 13, a radar mast 14 for facilitating communication with the outside is located, and the radar mast 14 can be folded. This is to lower the height of the vessel as it passes through the bridge.

In addition, the engine room casing 16 is located on the stern side of the residence 12, and various equipment such as a boiler and an exhaust device may be located inside the engine room casing 16.

The funnel casing 20 is located at the top of the engine room casing 16, and the power supply generator and diesel engine (or steam turbine) located inside the engine room 10 of the ship are located at the top of the funnel casing 20. A funnel (21) for discharging exhaust gas to the outside of the hull is located. The funnel 21 is not positioned vertically but is formed to be inclined in the stern direction.

First, the funnel 21 is positioned to be inclined in the stern direction. First, the exhaust gas does not reach the residence 12 and the wheel house 13 as much as possible, thereby creating a comfortable living environment for passengers and securing the field of view of the helm. It is to do.

Second, it is to make the ship easily pass through the bridge by lowering the height of the ship as much as possible.

Conventional funnels are arranged in the middle of the ship's hull upper middle or middle to slightly stern side. In this case, as the funnel is installed high above the hull for smooth discharge of exhaust gas, the space where the funnel is installed is a container. There was a problem in that the space utilization was reduced because it could not be loaded.

In addition, since the conventional funnel must have a large-diameter pipe and a supporting structure for supporting the pipe, the installation structure is complicated.

Republic of Korea Patent Publication No. 10-2009-54818 (published date: June 1, 2009)

Accordingly, the present invention is designed to solve the conventional problems as described above, and the problem to be solved by the present invention is to allow the exhaust gas generated from the marine engine to be discharged into the water (in the sea) rather than in the atmosphere. , It is to provide an underwater exhaust pipe of a ship to form the end portion of the exhaust pipe in a scoop structure so that the outboard discharge of exhaust gas is smoothly performed.

A solution for solving the above problems is an underwater exhaust pipe provided in the stern to discharge exhaust gas generated from the engine inside the ship into the water outside the ship,

The underwater exhaust pipe is provided to protrude from the inside of the stern portion to the outside of the ship, and the end portion of the underwater exhaust pipe is formed as a scoop portion in which a cutout is formed in a portion to smoothly discharge exhaust gas by reducing pressure.

In addition, the incision of the scoop part is formed on the opposite side of the direction of the bow part from the stern part, which is the direction in which the ship travels.

In addition, the protruding length of the incision from the outer surface of the ship is formed to be 0.4 times the inner diameter of the scoop of the underwater exhaust pipe.

In addition, the angle of formation of the incision in the scoop portion is formed in the range of 27 degrees to 34 degrees from the horizontal center line to the upper and lower portions, respectively.

As described above, the present invention is to provide an underwater exhaust pipe that protrudes underwater into the stern of the ship so as to be discharged into the water instead of being discharged into the atmosphere when discharging exhaust gas generated from the engine of the ship. It has an effect of providing a pleasant environment by preventing air pollution by exhaust gas in the cabin.

In addition, the present invention, the end portion of the underwater exhaust pipe is formed as a scoop portion having a cut-out portion, the pressure at the scoop portion is lowered by the speed difference of the fluid during ship operation, so that the exhaust gas can be smoothly discharged. There is.

1 is a side view showing a stern portion of a conventional ship.
Figure 2 is a rear view schematically showing the installation state of the underwater exhaust pipe according to an embodiment of the present invention.
Figure 3 is a side view schematically showing the installation state of the underwater exhaust pipe according to an embodiment of the present invention.
4 is an enlarged perspective view of an end portion of the underwater exhaust pipe of FIG. 2.
FIG. 5 is a cross-sectional view of the end portion of the underwater exhaust pipe of FIG. 4.
6A is a cross-sectional view taken along line AA in FIG. 5, and (B) to (D) are cross-sectional views showing the ends of the underwater exhaust pipe having a different shape from (A).

Hereinafter, specific details for carrying out the present invention will be described in detail based on the attached example drawings.

The terminology used in the present specification has been selected as a general terminology that is currently widely used while considering functions, but this may be changed according to intentions or customs of a person skilled in the art or the appearance of new technologies. Also, in certain cases, some terms are arbitrarily selected by the applicant, and in this case, their meanings will be described in the description of the corresponding specification. Therefore, it is intended to clarify that the terms used in the present specification should be interpreted based on the actual meaning of the terms and the contents of the present specification, not simply the names of the terms.

Figure 2 is a rear view schematically showing the installation state of the underwater exhaust pipe according to an embodiment of the present invention, Figure 3 is a side view schematically showing the installation state of the underwater exhaust pipe according to an embodiment of the present invention.

2 and 3, the underwater exhaust pipe 120 for discharging exhaust gas generated from the engine 110 of the ship 100 into the outboard underwater is installed, on the stern portion 101 side of the ship Can be deployed.

Moreover, the underwater exhaust pipe 120 is formed to protrude outwardly of the vessel 100 so as to extend in the lateral direction in the traveling direction (longitudinal direction) of the vessel 100.

The end of the underwater exhaust pipe 120 may be formed as a scoop 121 (scoop), as shown in FIG. 2.

As shown in FIG. 4, the scoop part 121 may be formed in a form having an incision part 121a by cutting a part of an end portion of the exhaust pipe 120.

In other words, at the end of the underwater exhaust pipe 120, it has a structure in which only a portion is cut along the circumferential direction, and at the same time, it can also have a structure cut into a predetermined length in the longitudinal direction.

In addition, the arrangement direction of the incision part 121a is to be located on the opposite side when viewed in the direction of travel (direction from the stern to the bow) (the direction of the arrow in FIG. 4) when the ship 100 is in operation.

The scoop part 121 may be formed integrally with the underwater exhaust pipe 120 or may be separately manufactured and coupled to the end of the underwater exhaust pipe 120.

In addition, the scoop part 121 protrudes from the outer surface of the ship 100, and the protruding length (ℓ) may be expressed by the following equation.

[Equation 1]

ℓ = 0.4 ㆍ D

Here, ℓ is the protruding length of the underwater exhaust pipe 120 protruding from the outer surface of the ship, D is the inner diameter of the scoop 121 of the underwater exhaust pipe 120.

That is, as shown in Figure 5, the protruding length (ℓ) is preferably formed to 0.4 times the inner diameter (D) of the scoop 121 of the underwater exhaust pipe (120).

In addition, as shown in FIG. 5, the formation range of the cut-out portion 121a of the scoop part 121 is formed by the angle α on the upper and lower portions of the horizontal center line, and the range of the angle α is 27 °. It is desirable to set ~ 34 °.

In addition, FIG. 6 is a cross-sectional view taken along line A-A in FIG. 5 and shows the structure of various types of scoops 121. That is, while having a structure protruding to the outer surface of the ship, it is possible to assume the structures (A) to (D) of FIG. 6, the same structure as that of FIG. Is most preferred.

6 (B) is a structure without the incision (121a) in the structure (A), Figure 6 (C) is a structure in which one side is a slanted structure and the incision (121a) is formed, Figure 6 (D ) Is a structure without the incision (121a) in Figure 6 (C).

In other words, as shown in the following Table 1, it can be seen through the correlation between the resistance and the flow rate when the structure of the scoop 121 is formed with the structures of FIGS. 6A to 6D.

Item (A) (B) (C) (D) resistance(%) 100 110 106 120 flux(%) 100 81 122 108

The results in Table 1 are the results obtained by numerical calculation by computerization through modeling.

In Table 1, the resistance means the resistance to the ship's speed, and the flow rate means the flow rate of the fluid discharged through the exhaust pipe.

As shown in Table 1, when the resistance (%) and the flow rate (%) are assumed to be 100 based on the structure (A) of FIG. 6, the structure (B) (C) (D) is relatively shown in Table 1. The results as shown were obtained, and the functionality of extracting the required flow rate was satisfied, but the resistance was small and considering the ease in manufacturing and installing the actual structure (A), the structure was obtained in the most desirable form.

In other words, according to one embodiment of the present invention, by forming the incision part 121a of the scoop part 121, to form a vortex so as to minimize a decrease in speed performance of the vessel, and at this time, the incision part 121a The angle (α) of the forming range is set to a range of about 27 degrees to 34 degrees, thereby minimizing the decrease in ship speed performance.

In addition, the underwater exhaust pipe 120 according to an embodiment of the present invention may be provided with a backflow prevention device that prevents seawater from flowing back into the underwater exhaust pipe 120.

The backflow prevention device may be configured as a backflow prevention valve, which is electrically connected to the control unit and operates under control of the control unit, thereby preventing backflow of exhaust gas.

In addition, the present invention is to configure the compressed air supply line to communicate with the underwater exhaust pipe 120 so that the compressed air generated from the compressed air system provided in the vessel 100 is supplied to the underwater exhaust pipe 120, so that the underwater exhaust pipe 120 Through this, when the exhaust gas is discharged, it is possible to easily discharge the exhaust gas regardless of the operating conditions of the ship.

Underwater exhaust pipe 120 according to an embodiment of the present invention having such a structure, when the exhaust gas generated by the operation of the engine 110 during the operation of the ship 100 is discharged, so that the exhaust gas is discharged into the water, It does not flow into the hull, and consequently, no contaminated air is supplied to the cabin, thereby providing comfort.

Here, as shown in FIG. 4, the underwater exhaust pipe 120 according to an embodiment of the present invention forms a structure in which the scoop part 121 is formed at the end, and considering the ship moving direction, the underwater exhaust pipe 120 ), The opposite side of the incision part 121a of the scoop part 121, that is, the direction in which the ship proceeds from the clogged side to the right in the drawing, and according to the direction of travel, the speed of the ship 100 by the Bernoulli theorem Proportional to the pressure in the scoop 121 is lowered, it is to guide the discharge of the exhaust gas on board smoothly into the water.

In other words, Bernoulli's theorem is that when an ideal fluid is flowing, the pressure is low where the fluid velocity is high and the pressure increases when the fluid velocity is slow. Will be lowered.

Therefore, the scoop part 121 formed at the end of the underwater exhaust pipe 120 has a longer fluid transport path, so that the fluid velocity increases and the pressure decreases. Accordingly, when the exhaust gas generated from the engine 110 is discharged, it can be smoothly discharged into the water outside the ship.

At this time, the amount of exhaust gas is proportional to the speed of the ship 100.

In addition, as described in Equation 1, the protruding length (l) of the incision (121a) from the outer surface of the ship (100) is formed to be 0.4 times the inner diameter (D) of the scoop (121) of the underwater exhaust pipe (120). This is preferable, and as shown in Table 1, the structure (A) of FIG. 6, that is, the structure of the scoop part 121 of FIG. 4 can minimize the deterioration of ship speed performance.

As described above, the underwater exhaust pipe 120 according to an embodiment of the present invention does not discharge exhaust gas generated from an engine operating during ship operation into the sea but discharges it into the sea without discharging it into the air, thereby causing air pollution in the cabin. Fundamentally.

In addition, the end of the underwater exhaust pipe 120 is made of a scoop portion 121 structure, it is possible to discharge the exhaust gas is discharged more smoothly.

In addition, according to an embodiment of the present invention, the inside of the underwater exhaust pipe 120 is provided with a backflow prevention device (for example, a backflow prevention valve) to prevent seawater from flowing back from the end of the underwater exhaust pipe 120. have.

In addition, the present invention is to supply compressed air to the interior of the underwater exhaust pipe 120 so that it can be smoothly discharged into the water when exhaust gas is discharged regardless of the operating conditions of the ship, that is, the driving state of the engine.

In the above, specific embodiments of the present invention shown in the accompanying drawings have been described in detail, but these are only examples of preferred forms of the present invention, and the protection scope of the present invention is not limited to them. In addition, various embodiments of the present invention as described above are possible to perform various modifications and other equivalents by those skilled in the art within the technical idea of the present invention, and these modifications and other equivalent embodiments It is within the scope of the appended claims of the design.

10: engine room
11: Upper deck
12: residence
13: wheel house
14: radar mast
15: cargo hold
16: engine room casing
20: funnel casing
21: funnel
100: ship
110: engine
120: underwater exhaust pipe
121: scoop
121a: incision
D: inner diameter of the scoop
ℓ: Protrusion length of incision

Claims (4)

delete delete delete As an underwater exhaust pipe 120 provided in the stern 101 to discharge the exhaust gas generated from the engine 110 inside the ship 100 to the water outside the ship 100,
The underwater exhaust pipe 120 is provided to protrude from the inside of the stern portion 101 to the outside of the ship,
The end portion of the underwater exhaust pipe 120 is formed of a scoop portion 121 in which a cut-out portion 121a is formed in a portion to smoothly discharge the exhaust gas by lowering the pressure,
The angle of cut (121a) forming angle (α) of the scoop (121) is formed in the upper and lower 27 to 34 degrees from the horizontal center line, respectively, the underwater exhaust pipe of the vessel.

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