KR200356087Y1 - Float automatic opening/ closing type air pipe head device - Google Patents

Abstract

Provided is a float self-closing air line head device that makes it possible to quickly and surely establish a closed state of an air passage in the event of seawater intrusion.

An inner housing 11 is provided inside the outer housing 10 to form air passages consisting of compartments 25a, 25b, and 25c therebetween. The first opening 10a is formed at the bottom of the outer housing 10 so that the air pipe 3 and the lower partition chamber 25a are connected in series. The second opening 11a is formed in the upper part of the inner housing 11, and the upper compartment 25c and the inside of the inner housing 11 are connected in series, and the inside of the inner housing 11 is the 3rd opening 11b. Through the end opening 16a). When the float 13 is installed inside the inner housing 11 freely and seawater invades the inner housing 11, the float 13 moves to the upper limit position by buoyancy to open the second opening 11a. To be closed. The float 13 is formed in the hollow cylindrical shape which sealed the internal space by metal, such as stainless steel, Therefore, when the seawater invades, the float 13 quickly and reliably opens the 2nd opening 11a. It is possible to make it closed.

Description

Float automatic opening and closing air pipe head unit {FLOAT AUTOMATIC OPENING / CLOSING TYPE AIR PIPE HEAD DEVICE}

The present invention relates to a float automatic opening and closing air pipe head device, and more particularly, to a float automatic opening and closing air pipe head device that is mounted on the air pipe of the ship and prevents fluid such as seawater from entering the ship from the outside through the air pipe. It is about.

Conventionally, a float automatic opening / closing air pipe head device is used in an air pipe installed in a ship through the tanks in order to prevent seawater from entering a ballast tank, an oil tank, a clear water tank, etc. when the ship meets harsh weather. have.

That is, in the ballast tank of a ship, the seawater is monitored from the outside or the seawater in the ballast tank is drained to the outside, and for the oil tank of the ship, oil such as fuel oil, lubricating oil, etc. To take oil out of the oil tank is done. In such a case, when the fluid is introduced into the tank, the inside of the tank is pressurized, while when the fluid is removed from the tank, the inside of the tank is under negative pressure. An air pipe for communicating is provided to eliminate such a pressurized state and a negative pressure state. However, since the inside of the tank and the outside atmosphere communicate with each other in such an air pipe, when the ship meets the harsh weather, seawater may unnecessarily flow into the tank through the air pipe due to the waves. Therefore, in order to cope with such unreasonable points, the float automatic opening / closing air pipe head device is usually attached to the air pipe upper end of the ship.

Float self-opening air pipe head device has a free float, and when sea water enters the air pipe head in rough weather, the float automatically seals the air pipe by the incoming sea water, so that the sea water is unintentionally pushed through the air pipe. Prevent entry into the tank.

However, in recent years, the ship has been enlarged and the safety of the ship has been strengthened, and the internationally unified float type automatic closed air tube head metal approval standard, so-called P3, has been newly introduced. In other words, in order to ensure better safety of the vessel, the air pipe head metals attached to the air pipes of ballast tanks (sea water), oil tanks (fuel, lubrication), and water tanks (clear water) are `` automatic closure devices. And approved, ”was adopted in 1998 as the International Convention Load Lines for Ships (1966). Following this, IACS (International Association or Classification) reviewed the standard for approval and drafted P3 (Rew, 1 May 2001). The member ship supply associations of each country accept P3 as the ship supply association approval rule and start operation.

This approval standard is mainly divided into three tests.

(1) Leakage allowance for seawater entry is standardized

(2) Flow characteristic test (measurement of passage resistance when fluid flowed)

(3) Impact test (strength) of float

Among them, the allowable value of the amount of seawater leakage when the weather in (1) is not good is very small at 1 ml 2 ml / mm, which corresponds to 1/40 to 1/50 in the prior art. Therefore, in the prior art, since such a criterion cannot be satisfied, it is necessary to develop a new float automatic opening and closing air pipe head device.

It is an object of the present invention to provide a float automatic opening and closing air pipe head device, which makes it possible to quickly or surely establish a closed state of an air passage when seawater invades.

Another object of the present invention is to provide a float self-closing air pipe head device capable of satisfying a new standard (so-called P3 standard) of a float type self-closing air pipe head metal.

1 is a schematic front cross-sectional view showing a float automatic opening and closing air pipe head device according to an embodiment of the present invention.

2 is a schematic top view of the device of FIG. 1;

FIG. 3A is a view of the left half of a schematic left sectional view of the apparatus of FIG. 1, and FIG. 3B is a view of the right half of a schematic right sectional view of the apparatus of FIG.

Figure 4 is a schematic diagram when the device of the present invention is mounted on the air pipe connected to the oil tank.

5 is a schematic front sectional view showing a state in which seawater has entered the apparatus of FIG. 1;

6 (a) is a schematic diagram showing a state in which the apparatus 1 is inclined at 40 degrees to the left, and (b) is a schematic diagram showing a state in which the apparatus 1 is inclined at 40 degrees to the right.

<Description of the symbols for the main parts of the drawings>

1: Float automatic opening and closing air pipe head device

10: external housing 11: internal housing

11a: first opening 11b: second opening

12: guide rod 13: float

14 packing 15 plug

16: hood 16a: end opening

25a: Lower compartment 25b: Side compartment

25c: upper compartment

According to the present invention, a float automatic opening / closing air pipe head device, comprising: a first housing having a first opening attached to an air pipe of a ship and communicating with the air pipe, and mounted inside the first housing; A second housing having a third opening communicating with the outside from the first opening, and having a third opening communicating with the outside between the first opening and the second housing; Provided is a float self-closing air tube head device having a float which, when positioned in position, has a float that makes the second opening closed, and the float is in a substantially cylindrical state sealed inside. do.

Preferably, a packing of a predetermined shape made of a resilient material is mounted on an upper surface of the float, and when the float is located at the upper limit position, the packing is in close contact with a periphery of the second opening so that the second opening is opened. To impede the flow of fluid through the As this elastic material, it is possible to set it as synthetic rubber. In addition, the packing is preferably substantially in the shape of a plate, the cross section of the outer circumference having a wedge shape, and more preferably the wedge shape is inclined outward in the radial direction.

[Best Mode for Implementing a Design]

1 shows a schematic front view of a float automatic opening / closing air tube head device 1 constructed in accordance with an embodiment of the present invention. As shown, this apparatus 1 is attached to the upper part of the air pipe 3 fixed to the exposure deck 2 of a ship. In the example of illustration, the air pipe 3 is connected to the ballast tank 4 of a ship, and the seawater which has the sea level 5 is put in the ballast tank 4, and the sea level 5 is a ballast tank ( 4) It moves up and down by adding or draining seawater. The flange 3a is formed in the upper part of the air pipe 3, and this flange 3a and the bottom part of this apparatus 1 are integrally attached by the bolt 20. As shown in FIG.

The apparatus 1 basically has a dual structure housing structure of the outer housing 10 and the inner housing 11. That is, the outer housing 10 has a substantially box-shaped shape, the bottom portion of which is formed with a first opening 10a and the bottom portion is integrally mounted by the flange 3a and the bolt 20. have. The 1st opening 10a makes the inside of the outer housing 10 and the air pipe 3 connect in succession.

The inner housing 11 also has a substantially box-shaped shape, and is disposed inside the outer housing 10. The inner housing 11 is composed of upper and lower walls and a pair of left and right walls, and a lower wall thereof is spaced apart from a lower wall of the outer housing 10 by a predetermined distance to form a lower partition chamber 25a. On the other hand, the upper wall is spaced apart a predetermined distance from the upper wall of the outer housing 10 to form the upper partition (25c). In addition, the left and right pairs of walls of the inner housing 11 are spaced apart from the left and right pairs of walls of the outer housing 10 by a predetermined distance, and a pair of side compartments 25b are disposed between the respective walls. Forming. As shown in Figs. 1, 2, and 3 (a), these compartments 25a, 25b, and 25c are connected to each other to form an air passage 25 as a whole. The inner housing 11 is fixedly attached to the outer housing 10 by bolts 21.

In addition, a second opening 11a is formed in the upper wall of the inner housing 11, so that the interior of the inner housing 11 communicates with the upper partition 25c via the second opening 11a. . The inner housing 11 has a pair of side openings, but one opening is closed by a side wall to which the outer housing 10 corresponds, and the other opening 11b is covered by the hood 16. The third opening is formed. The hood 16 covers the third opening 11b, but forms an opening 16a in communication with the outside atmosphere at the bottom thereof. In addition, the hood 16 is fixedly attached to the outer housing 10 by the bolt 22.

The lower end of the guide rod 12 is fixed to the center of the bottom of the inner housing 11, and a float 13 fitted loosely to the guide rod 12 is provided. The float 13 has a substantially cylindrical shape, has a cavity sealed therein, and has a central insertion hole for allowing the guide rod 12 to be loosely inserted. Therefore, the float 13 is installed freely on the guide rod 12 over a predetermined distance range. The float 13 may be molded from metal, such as stainless steel, for example. The plug 15 is inserted into and fixed to the upper end of the center insertion hole of the float 13. The packing 14 of a predetermined shape is fixed on the upper surface of the float 13. The packing 14 is made of an elastic material such as synthetic rubber, for example, and has a substantially dish-like shape. That is, in the example shown in FIG. 5, the packing 14 is comprised in the peripheral part of the outer periphery by the wedge shape, and the wedge-shaped part is inclined toward radial direction outward. Therefore, the outer peripheral portion of the wedge shape of the packing 14 has a tip shape 14a having a thin tip shape, and the tip of the packing 14 has a thin tip shape when the float 13 is moved to an upper limit position. The tip portion 14a is pressed against the upper wall around the first opening 11a of the inner housing 11 to bring the first opening 11a of the inner housing 11 into the closed state. The tip portion 14a having an end shape contributes to reliably establishing this closed state.

Next, the operation of the float automatic opening / closing air pipe head device having the above-described configuration will be described. First, as shown in FIG. 1, in the apparatus 1, when the ship is in a normal sailing state, the float 13 is located at the lower limit position by its own weight. Therefore, the inside of the ballast tank 4 has the air path which consists of the lower compartment 25a, the pair of side compartment 25b, and the upper compartment 25c of the apparatus 1 with the air pipe 3 in between. The air passage 25 communicates with the inside of the internal housing 11 via the first opening 11a. The inside of the inner housing 11 is in communication with the outside atmosphere through the second opening 11b and the end opening 16a. In this state, when seawater is introduced into the ballast tank 4 from the outside, the liquid level 5 of the seawater in the ballast tank 4 rises, so that the air in the ballast tank 4 is arrows E1, E2, It flows like E3, E4, E5 and outflows to outside air. On the other hand, when the seawater in the ballast tank 4 is discharged to the outside, the liquid level 5 in the ballast tank 4 falls, and therefore, external air flows as shown by arrows I1, I2, I3, I4, and I5. It flows into the ballast tank (4).

Next, a description will be given, in particular with reference to FIGS. 5 and 6, of the case where the ship encounters, for example, rough weather and the seawater flows into the apparatus 1. As shown in FIG. 5, when seawater flows into the interior of the internal housing 11 of the apparatus 1 through the end opening 16a under the hood 16 as indicated by arrow A, the float 13 ) Is buoyant upward along the guide rod 12 as indicated by arrow B. Accordingly, as the seawater gradually flows into the inner housing 11, the float 13 moves upward and finally reaches its upper limit position, in which case the packing fixed to the upper portion of the float 13 14 is pressed against the periphery of the first opening 11a of the upper wall of the inner housing 11 to make the first opening 11a closed. Therefore, even if seawater flows into the inner housing 11 further, the seawater does not flow into the upper compartment 25c through the first opening 11a.

Fig. 6 (a) shows a case where the ship is rolled by a wave, and the device 1 is in a state of left angle of inclination of 40 degrees, and Fig. 6 (b) shows that the device 1 has a right angle of inclination of 40 The case where it became the state of FIG. In either case, the float 13 is moved upward along the guide rod 12 by the buoyancy B of the seawater flowing into the interior of the inner housing 11, and is positioned at the upper limit position. ) Is in a closed state.

In addition, although not shown in figure, it is possible to provide a fire prevention wire net in the 2nd opening 11b. In this case, it is possible to easily check the blocked state of the fire prevention wire mesh through the end opening 16a.

Next, FIG. 4 shows the case where this apparatus 1 is attached to the air pipe for oil tanks. That is, this apparatus 1 is attached to the upper part of the air pipe 3, and the air pipe 3 is connected to the oil tank 7 in series. Oil is accommodated in the oil tank 7, and the liquid level 8 moves up and down depending on the amount of oil in the oil tank 7. By the way, in this apparatus 1, since the end opening 16a is arrange | positioned outside the flange 3a as mentioned above, in order to prevent oil diffusion in the case where the oil tank 7 overflows, It is possible.

According to the present invention, since the float has a cylindrical shape and the inflow port of the seawater is located below, the float is likely to float, thus minimizing the invasion amount of the seawater. In addition, when the automatic packing of a predetermined shape is mounted on the upper portion of the float, the effect of preventing leakage during automatic closing is increased.

In addition, when the end opening communicating with the outside atmosphere of the apparatus is disposed outside the flange of the air pipe, it is possible to prevent oil diffusion during oil tank overflow. In addition, it is possible to provide a fire prevention wire mesh in the second opening, and in that case, it is possible to easily check the blocked state of the fire protection wire mesh from the end opening. Moreover, this apparatus can be detachably assembled by a nut, and can make coating and cleaning of an inner surface easy.

Claims (5)

In the float automatic opening and closing air pipe head device, A first housing mounted to an air pipe of the ship and having a first opening communicating with the air pipe; A second housing mounted inside the first housing and having a third opening communicating with the first housing from the first opening to the second opening and having a third opening communicating with the outside; Has a float which is installed freely in the second housing in a vertical direction and moves the second opening in a closed state when it is positioned at an upper limit position, Float automatic opening and closing air pipe head device, characterized in that the float has a substantially cylindrical shape in a hollow state sealed inside. 2. The packing according to claim 1, wherein a packing of a predetermined shape made of a resilient material is mounted on an upper surface of the float, and when the float is located at the upper limit position, the packing is in close contact with a peripheral portion of the second opening. Float automatic opening and closing air pipe head device, characterized in that to block the flow of fluid through the opening. The float automatic opening / closing air pipe head device according to claim 2, wherein the elastic material is synthetic rubber. The float automatic opening / closing air pipe head device according to claim 2 or 3, wherein the packing has a wedge shape in cross section. The float automatic opening / closing air pipe head device according to claim 4, wherein the wedge shape is inclined radially outward.