KR20110083826A

KR20110083826A - Air pipe automatic closing devices

Info

Publication number: KR20110083826A
Application number: KR1020100003763A
Authority: KR
Inventors: 허재경
Original assignee: 허재경
Priority date: 2010-01-15
Filing date: 2010-01-15
Publication date: 2011-07-21

Abstract

PURPOSE: An automatic air duct closing device which can reduce manufacturing costs is provided to prevent the inflow of seawater into a tank inside a ship by using a float which is elevated by floating force. CONSTITUTION: An automatic air duct closing device comprises a metal net(118), a protective cover(119), a float, and a packing part(114). The metal net and the protective cover are installed on one-side part of the connection pipe integrated body. The float is inserted in a guide bar(115) fixed inside the body to be ascended and descended. A through hole is formed in the center of the float, and the guide bar is inserted into the through hole. The packing part has an inner side correcting to the shape of outer surface of the float in order to maintain airtightness.

Description

Air pipe automatic closing devices

The present invention relates to an automatic closing device of an air pipe that is installed at the top of the air pipe to block the inflow of seawater into the tank of the ship by the operation of a float (float) is raised and lowered by buoyancy action, in particular, inside the tank of the ship It is simple to manufacture and cost-effective to prevent damage to parts such as floats which are configured to block the inflow of seawater due to the outflow of seawater from the sea or the occurrence of rapid air sucked into the tank. It relates to an automatic closing device of the air pipe so that it can be saved.

Generally, the air pipe is connected to the upper part of the tank and installed on the hull surface to prevent the positive pressure and the negative pressure generated from various tanks of the ship. I'm trying to.

In addition, an air vent head is installed on the upper part of the air pipe to prevent the seawater introduced into the hull surface from the nipple into the tank through the air pipe.

The above-mentioned automatic closing device is connected to the air pipe of the ship tank, and the air is integrated into the tank and induces the fluid inside the tank to flow out when the water or oil in the tank is overloaded, and is installed inside the body to the outside Float to prevent seawater from entering the air pipe from the air pipe, a metal net installed in the openings on both sides of the body to prevent foreign substances and flames from entering the outside, and a protective cover for protecting the float and the metal net It is.

As shown in FIG. 2, the automatic closing device of the air pipe according to the related art is formed so that the upper and lower space portions 410 and 420 of the main body communicate with the air pipe 10, and the central space portion 430 is outside the atmosphere. Is formed in communication with, the central space portion and the upper space is in communication with, the guide rod 440 is installed in the center of the central space portion is installed as a float 450 is moved up and down by buoyancy action according to the guide rod guide When the seawater flows into the inside of the automatic closing device of the air pipe due to the storm, the float rises to block the opening communicating with the upper space part, thereby preventing the sea water from flowing into the air pipe through the upper space part to maintain watertightness. It is common to be.

However, as shown in the schematic illustration of the internal state of the tank of the vessel, that is, the ballast tank of the general vessel of FIG. 1, in the case of the ballast tank, the operating conditions such as draft and trim of the vessel In order to adjust, it is necessary to fill and empty the seawater, and if the seawater is overcharged, the seawater charged through the air pipes is discharged. At this time, a large pressure is applied to the float of the automatic closing device due to the outflowing seawater. As the guide rod installed in the center is bent, the float does not move up and down smoothly, and the packing and the float do not come into close contact with each other.

In addition, when the ship is operating in the Nether, the seawater partially loaded inside the tank is swayed by the movement of the ship, and thus the upper air flows in and out through the air pipe, where the operating state of the automatic closing device of the conventional air pipe of FIG. As shown in the cross-sectional view, the air is sucked very rapidly and a large pressure is applied to the upper part of the float, which causes the float to rise immediately and impinge on the upper surface. there was.

On the other hand, as a related art, a number of registered utility model 20-0310950 (automatic closing device of the air pipe of the ship tank) and the registered utility model 20-0335998 (air ventilation and seawater discharge valve for the ship), but a number of the known automatic closing The device is complicated in structure and difficult to manufacture, and the known automatic closing device damages parts such as floats and guide rods configured to block the inflow of seawater due to the outflow of seawater and rapid air intake as described above. There was a problem.

In addition to the above-mentioned problems, in the above-described known technologies, the leak tolerance of the air tightness of the air pipe closing device strictly required by the IACS (International Association of Societies) may be immersed in the water at a speed of 8 m / min at a normal posture and a slope of 40 degrees. There is a fatal problem that does not meet the requirement that nominal diameter x 2ml.

An object of the present invention for solving the above problems is installed on the top of the air pipe is an automatic closing device of the air pipe to block the inflow of seawater, etc. into the tank of the vessel by the operation of the float (float) is raised and lowered by buoyancy action In particular, it is possible to prevent damage to parts such as floats, which are configured to block the inflow of seawater due to the outflow of seawater from a tank of a ship or the occurrence of rapid air sucked into the tank. It is to provide the automatic closing device of the air pipe so that the structure is simple and the production is easy and the cost can be reduced.

Features of the automatic closing device of the air pipe according to the present invention for achieving the above object, a metal mesh and a protective cover is installed on one side of the integrated body attached to the connecting pipe, the guide bar fixed to the inside of the body CLAIMS 1. An automatic closing device for an air pipe of a marine tank, in which a float floated in and lifted up, comprising: a float having the shape of a truncated cone as a whole, and having a through hole fitted in the guide bar at its center; The float includes a packing having an inner side corresponding to the shape of the outer side of the float in order to maintain airtightness when the float rises along the guide bar by buoyancy.

As expected effects due to the above-described features of the present invention, the structure is simple, the production is convenient, as well as to reduce the cost, such as to obtain the effect, and also due to overflow inside the tank of the ship It is possible to prevent the damage of parts such as float, which is configured to block the inflow of the seawater from the rapid intake of air generated by the seawater and the seawater of the seawater partially loaded inside the tank. Of course, this means that the leak tolerance of the air tightness of the air pipe closure system, which is strictly required by the IACS, is immersed in water at a speed of 8 m / min at a normal posture and a 40 ° slope. There is an effect that can be satisfied that the condition should not exceed 2ml.

1 is a schematic illustration of the internal state of a ballast tank of a typical ship
Figure 2 is a cross-sectional view of the operating state of the automatic closing device of a conventional air pipe
3 and 4 is a cross-sectional view showing the operating state of the automatic closing device of the air pipe according to the present invention

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, in which: FIG.

First of all, let's take a quick look at the main diagrams of airtightness in the automatic closing of air pipes. It requires stringency not to exceed nominal diameter x 2 ml.

At this time, in the above-described prior arts, in particular, when the float 450 has the shape of a flat plate as shown in FIG. 2, it has a technical limitation that it is difficult to maintain the airtightness when the inclination spreads to 40 °. .

Therefore, in the present invention, the float and the packing part may maintain the airtightness at a constant level or higher at all times even at an inclination from 0 ° to 40 °. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 and 4 are cross-sectional view illustrating an operating state of the automatic closing device of the air pipe according to the present invention, and FIG. 3 shows a state in which the automatic closing device according to the present invention is opened in a normal state of air flow. 4 shows a state in which the automatic closing device according to the present invention is closed due to the intrusion of seawater.

As shown, the automatic closing device of the air pipe according to the present invention, the metal mesh 118 and the protective cover 119 on one side of the integrated body 111 is formed with a connection pipe 110 formed in communication with the air pipe (10) Is installed, and the float 116 fitted to the guide bar 115 fixed to the inside of the body 111 has a basic structure to move up and down.

At this time, the float 116 has the shape of a truncated cone as a whole, and has a through hole fitted in the guide bar 115 in the center thereof; The float 116 rises along the guide bar 115 by buoyancy generated by the seawater introduced from the outside and tightly couples to the packing part 114 to block the inflow of seawater into the air pipe 10. .

Therefore, the packing part 114 has an inner surface corresponding to the shape of the outer surface of the float 116 in order to maintain a higher airtightness when tightly coupled with the float 116.

As such, the space in which the guide bar 115, the float 116, and the packing part 114 exist is called a lifting space part 117.

Reference numeral 112 is a space opening cover for maintaining the components implementing the lifting space 117, reference numeral 113 is a fixing means for fixing the cover 112 or the protective cover 119.

Any one of the packing part 114 or the float 116 is manufactured using a soft rubber material so as to minimize the damage caused by the collision.

Reference numeral 114a is a packing fixing part for preventing the packing part 114 from being separated, and reference numeral 115a is a sudden change from the closed state to the open state in which the float 116 is coupled to the packing part 114. In this case, it is dustproof rubber to prevent damage caused by collision with the body.

While the invention has been shown and described with respect to the specific embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Anyone with it will know easily.

10: air tube
110: connector
111: Torso
118: metal mesh
119: protective cover
114: packing part
114a: Packing fixing parts
115: Guide bar
115a: Dustproof Rubber
116: float
117: lifting space
112: cover

Claims

In the automatic closing device of the air pipe of the ship tank in which the metal mesh and the protective cover is installed on one side of the integrated body attached to the connecting pipe, and the float fitted to the guide bar fixed inside the body moves up and down:
The float is generally in the shape of a truncated cone and has a through hole fitted in the guide bar at the center thereof;
And a packing part having an inner side corresponding to the shape of the outer side of the float to maintain airtightness when the float is raised and tightly coupled along the guide bar by buoyancy.