KR200483679Y1 - Apparatus for preventing breakage of bottom drain plug - Google Patents
Apparatus for preventing breakage of bottom drain plug Download PDFInfo
- Publication number
- KR200483679Y1 KR200483679Y1 KR2020150004637U KR20150004637U KR200483679Y1 KR 200483679 Y1 KR200483679 Y1 KR 200483679Y1 KR 2020150004637 U KR2020150004637 U KR 2020150004637U KR 20150004637 U KR20150004637 U KR 20150004637U KR 200483679 Y1 KR200483679 Y1 KR 200483679Y1
- Authority
- KR
- South Korea
- Prior art keywords
- tank
- protective casing
- plug
- bottom plug
- guider
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B13/00—Conduits for emptying or ballasting; Self-bailing equipment; Scuppers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B17/00—Vessels parts, details, or accessories, not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
- B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
- B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The present invention relates to a device for preventing damage to a bottom plug, and more particularly, to a device for preventing damage to a bottom plug by using a protective casing enclosing a bottom plug installed at the bottom of a tank when an internal pressure of a liquid cargo tank rises, And the drain hole is broken by an increase in the internal pressure in the process of sinking in the overturned state, thereby preventing the bottom plug from falling off.
Description
More particularly, the present invention relates to a bottom plug preventive device for preventing a bottom plug installed on the bottom of a liquid cargo tank from falling off due to the influence of internal pressure and air pressure rise at the time of ship overturning .
Bottom drain plug refers to a hole in a suitable location near the bottom of the tank for discharging residual water from various liquid cargo tanks (fuel tanks, fresh water tanks, ballast tanks, etc.) drain hole (hereinafter referred to as "drain hole"). It is completely sealed and covered with cement before being docked.
On the other hand, the above-mentioned installation regulations for the bottom plug are not specifically enforced in the international convention or the Rules for the Classification of Steel Ships, but they are mostly installed by the needs of the shipowner and the need for inspection. In addition, there is no requirement for strength by water pressure or air pressure, but watertightness must be ensured.
This is because, as shown in FIG. 1, in order to prevent the ship s from sinking when the ship is excessively inclined or overturned due to an accident during the ship operation, it is required to secure buoyancy above the weight of the ship. Since the air cushion inside the tank acts as a buoyant element, it is necessary to shut off the discharge of the air.
Based on this technical idea, Korean Patent Laid-Open Publication No. 10-2014-0056638 discloses a plug for a bottom of a ballast tank of a ship which is prevented from dropping out of the plug by improving the workability so as to facilitate the re- However, it does not have sufficient durability to withstand water pressure and air pressure due to the rise of the internal pressure of the liquid cargo tank, merely focusing on the structural complement of the purpose of disassembling and fixing the existing bottom plug.
Therefore, when the internal pressure of the ship sinks due to an accident, the bottom drain hole portion of the tank, which is relatively durable, may be easily broken. Accordingly, when the bottom plug is dropped, The air trapped in the inside of the ship has been spouted (air layer disappears), leading to the problem of accelerating the loss of buoyancy of the ship.
The present invention has been proposed in order to solve the above problems. When the internal pressure of the liquid cargo tank rises, the elevated pressure is primarily blocked so as not to act directly on the bottom plug, and when the pressure is excessive, Thereby preventing breakage of the tank bottom drain hole due to a rise in the pressure in the liquid cargo tank and consequent detachment of the bottom plug.
In order to accomplish the above object, the present invention provides a method for preventing internal pressure generated due to inclination or rollover of a hull from directly acting on the bottom plug in a state of being separated from a bottom plug installed in a drain hole of a bottom of a liquid cargo tank of a ship A protective casing which is moved in accordance with a pressure increasing action when the pressure rises excessively and is brought into close contact with the bottom of the tank so as to surround the bottom plug; A support drum attached to the bottom of the tank for guiding the movement of the protective casing at the time of pressure rise, together with mounting and assembling of the protective casing; And a plurality of locking members provided on the support drum to prevent the protection casing from separating from the bottom of the tank.
The protection casing has a " C "-shaped structure so as not to interfere with the bottom plug when it is in close contact with the bottom of the tank, and an accommodation space opened in the direction of close contact with the bottom of the tank is provided inside. A plate made of a metal material having rigidity and durability capable of withstanding the rising pressure in the cargo tank and a finish material integrally protruding and attached to the entire one side edge of the plate material.
The support drum includes a flange integrally joined to the bottom of the tank with a periphery around the bottom plug as a center, and an operation space for securing the receiving and mounting range of the protective casing by being assembled successively on the upper side of the flange. And a cylindrical guider having a predetermined height so as to be provided on the inner side.
In the lower portion of the flange, at least one cutout portion is formed in the lower portion to enable the drainage of the residual water through the drain hole.
Wherein a plurality of mounting holes for internally receiving and assembling the locking member are formed in the guider at equal intervals on the upper side in a lateral direction and the locking member is inserted into the mounting hole so as to be partially protruded inside the guider An elastic spring having elasticity for pushing the locking bundle, and a wrench bolt fastened to the mounting hole for supporting the rear end of the elastic spring.
At the center of the outer surface of the plate, a recess is formed inwardly for centralizing the working pressure.
The finishing material is made of rubber or urethane material exhibiting stretchability and buffering force in order to alleviate impact and ensure watertightness when adhering to the bottom of the tank.
According to the present invention, when the accident occurs, the protective casing, which is spaced apart from the bottom of the tank, is primarily blocked so that the rising pressure does not directly affect the bottom plug when the ship's behavior changes and the internal pressure of the liquid cargo tank increases due to seawater inflow. The protection casing is wrapped around the bottom plug in a state in which the protection casing is in close contact with the bottom of the tank, thereby protecting the bottom drain hole of the tank due to the pressure rise and thereby preventing the bottom plug from falling off.
In other words, the air cushion of various liquid cargo tanks formed on the bottom of the ship is one of the factors contributing to the buoyancy to float the hull, and by securing buoyancy of the hull due to the above-mentioned action and effect, It is possible to prevent the sinking of the ship at the time of accident, or to delay it as much as possible, so that the rescue and towing can be facilitated.
1 is an exemplary view schematically showing a rollover state of a ship;
2 is a perspective view showing an external structure of a bottom plug breakage prevention device according to the present invention.
3 is an exploded perspective view showing an assembling relationship of the bottom plug breakage prevention device according to the present invention.
Fig. 4 is a front sectional view showing a constitutional relationship of a device for preventing breakage of a bottom plug according to the present invention; Fig.
5A and 5B are operational state sectional views showing an embodiment of a bottom plug breakage prevention device according to the present invention.
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the constituents of the drawings, it is to be noted that the same constituents are denoted by the same reference numerals as much as possible even if they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.
FIG. 2 is an exploded perspective view showing an external structure of a bottom plug breakage preventing apparatus according to the present invention, FIG. 3 is an exploded perspective view showing an assembling relationship of a bottom plug breakage preventing apparatus according to the present invention, FIG. 5A and FIG. 5B are operational sectional views showing an embodiment of a bottom plug breakage preventing apparatus according to the present invention. FIG.
As shown in Figs. 2 and 3, the bottom-plug breakage preventing apparatus A according to the present invention is arranged to be spaced apart from a bottom plug provided in a drain hole at the bottom of a liquid cargo tank of a ship, A protection casing (1) which blocks the internal pressure generated by the bottom casing (2) from directly acting on the bottom plug, moves in accordance with the pressure increase action when the pressure rises excessively and is brought into close contact with the bottom of the tank so as to surround the bottom casing A
The
To this end, a
A plurality of
In addition, a
The finishing
The
A
A
A threaded
A plurality of mounting
In addition, similarly to the
The
(G) is a gap formed between the bottom of the tank and the protective casing as the protective casing is spaced apart from the bottom of the tank by the locking member.
Hereinafter, the operation of the bottom plug breakage preventing device A according to the present invention will be described in detail.
First, the
Next, a
Subsequently, the
Thereby, the locking
Here, the
Hereinafter, an embodiment of the present invention will be described. As described so far, when the ship (s) equipped with the breakage prevention device (A) of the present invention is overturned or overturned due to an accident during operation, the internal pressure of the air layer and the liquid flow inside the liquid cargo tank rises The damage of the bottom plug p can be prevented by the breakage prevention device A according to the present invention, .
More specifically, when the liquid cargo tank is turned over by the rollover of the ship (ship), as shown in FIG. 5A, the breakage prevention device A of the present invention is also turned upside down along the liquid cargo tank. Accordingly, when pressure is generated in the liquid cargo tank, the pressure at this time is primarily blocked from acting directly on the protective casing (1).
When the pressure rises excessively, the
Here, the impact that may be generated in the process of sticking the
In other words, when the internal pressure of the liquid cargo tank is raised when the ship is excessively tilted or overturned due to an accident during the operation of the ship, the
It will be understood by those skilled in the art that various modifications, substitutions and alterations can be made hereto without departing from the spirit and scope of the invention as defined by the appended claims. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are intended to illustrate and not to limit the technical idea of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings . The scope of protection of the present invention should be construed according to the following claims, and all technical ideas which are within the scope of the same should be interpreted as being included in the scope of the present invention.
A: breakage prevention device, 1: protective casing, 1a: accommodation space
2: support drum, 2a: working space, 3: locking member
11: plate material, 12: finish material, 21: flange
22: guider, 31: locking bundle, 32: elastic spring
33: wrench bolt, 111: guide projection, 111-1: receiving groove
112: concave portion, 113: first wrench groove, 211: female thread portion
212: incised portion, 221: male thread portion, 222: guide groove
223: mounting hole, 223-1: step portion, 224: second wrench groove
Claims (8)
The protective casing is mounted on the support drum by pushing each guide protrusion protruding from the outer periphery of the plate member in a state in which the guide protrusions are fitted into guide grooves inwardly of the inner periphery of the guider of the support drum, The lock piece of the lock member protruding from the stomach is fitted into the receiving groove inwardly of the outer surface of the guide protrusion so that the plate member is no longer pushed into the bottom of the tank by the locking pack; ≪ / RTI >
When the pressure rises, the protective casing is pushed toward the bottom of the tank. As a result, the locking claw of the locking member is released from the guide projection of the plate member, Wherein the bottom plug is in close contact with the bottom of the tank to cover the bottom plug.
Characterized in that the protective casing has a " C "-shaped structure so as not to interfere with the bottom plug when it is in close contact with the bottom of the tank, and an accommodation space opened in the direction of close contact with the bottom of the tank is provided inside. Plug breakage prevention device.
Wherein the support drum includes a flange integrally joined to the bottom of the tank around the bottom plug,
And a cylindrical guider having a predetermined height so that a working space for securing the receiving and mounting range of the protective casing and the moving range of the protective casing is provided on the inside when the flange is fastened and assembled on the upper side of the flange.
Wherein the protective casing comprises a plate made of a metal material having rigidity and durability capable of withstanding a rising pressure in the liquid cargo tank,
And a finishing material integrally protruding from the entire one side edge of the plate to provide the receiving space inward.
And a bottom portion of the flange is formed with at least one cutout portion at a lower portion thereof to enable discharge of residual water through the drain hole.
Wherein a plurality of mounting holes for internally receiving and assembling the lock member are formed in the guider transversely at equal intervals on the upper side,
The locking member may include a locking pawl inserted into the mounting hole and partially protruding from the inside of the guider, an elastic spring having elasticity for pushing the locking pawl, And a wrench bolt fastened and assembled to the bottom plug.
Wherein a recess is formed inwardly at the center of the outer surface of the plate for centralizing the working pressure.
Wherein the finishing material is made of rubber or urethane material exhibiting stretchability and buffering force in order to mitigate impact and ensure watertightness when brought into close contact with the bottom of the tank.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR2020150004637U KR200483679Y1 (en) | 2015-07-09 | 2015-07-09 | Apparatus for preventing breakage of bottom drain plug |
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KR2020150004637U KR200483679Y1 (en) | 2015-07-09 | 2015-07-09 | Apparatus for preventing breakage of bottom drain plug |
Publications (2)
Publication Number | Publication Date |
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KR20170000268U KR20170000268U (en) | 2017-01-19 |
KR200483679Y1 true KR200483679Y1 (en) | 2017-06-14 |
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KR2020150004637U KR200483679Y1 (en) | 2015-07-09 | 2015-07-09 | Apparatus for preventing breakage of bottom drain plug |
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Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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KR200483805Y1 (en) * | 2016-02-02 | 2017-06-26 | 한국해양과학기술원 | Apparatus for preventing breakage of bottom drain plug |
KR200485970Y1 (en) * | 2016-07-25 | 2018-03-19 | 한국해양과학기술원 | Apparatus for preventing breakage of bottom drain plug |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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KR200482100Y1 (en) | 2015-07-09 | 2016-12-15 | 한국해양과학기술원 | Casing-unit for preventing breakage of bottom drain plug |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20140056638A (en) | 2012-10-30 | 2014-05-12 | 현대중공업 주식회사 | Bottom plug for ballast tank of ship |
KR20150000155U (en) * | 2013-07-03 | 2015-01-13 | 대우조선해양 주식회사 | Scupper plug for ship hull |
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2015
- 2015-07-09 KR KR2020150004637U patent/KR200483679Y1/en active IP Right Grant
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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KR200482100Y1 (en) | 2015-07-09 | 2016-12-15 | 한국해양과학기술원 | Casing-unit for preventing breakage of bottom drain plug |
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KR20170000268U (en) | 2017-01-19 |
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