WO2009088128A1

WO2009088128A1 - Hermetic sealing device for urgently repairing vessels

Info

Publication number: WO2009088128A1
Application number: PCT/KR2008/002879
Authority: WO
Inventors: Bang-Ja Park
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-01-11
Filing date: 2008-05-23
Publication date: 2009-07-16
Anticipated expiration: 2010-07-11

Abstract

Disclosed therein is a hermetic sealing device for urgently repairing vessels. The hermetic sealing device is closely fixed to a broken area of the vessel to urgently repair the body of the vessel when the body of the vessel is broken by the external shock or a collision, thereby initially coping with the breakage of the vessel. The hermetic sealing device (100) includes: a close contact part (10) coming in close contact with the broken area of the body of the vessel; an iron plate part (20) mounted at the back of the close contact part (10) for raising a fixing force between the close contact part (10) and fixing parts (30); and the fixing parts (30) for fixing the close contact part (10) and the iron plate part (20) to the broken area (40) of the vessel (50), so that the broken area (40) of the vessel (50) gets watertight in such a way as to prevent an outflow of oil or gas from the broken area (40) when the vessel (50) is broken. Accordingly, the hermetic sealing device (100) can urgently and initially cope with the breakage of the vessel (50) to thereby prevent large-scale accidents, reduce man power for a repairing work due to a simple repairing work, and be used semi-permanently.

Description

HERMETIC SEALING DEVICE FOR URGENTLY REPAIRING

VESSELS

Technical Field

[1] The present invention relates to a hermetic sealing device for urgently repairing vessels, and more particularly, to a hermetic sealing device, which is closely fixed to a broken area of the body of a vessel to urgently repair the body of the vessel when the body of the vessel is broken by an external shock or a collision, thereby initially coping with an unexpected breakage of the vessel. Background Art

[2] In general, a vessel is a structure to carry people, livestock, goods and so on and transport them by sea, and occupies a position as means of transportation, which is indispensable for the present industry together with vehicles and airplanes, since the whole world is shrunk into one zone of life so that a trade volume is increased and goods can be effectively transported in line with the trend of a high-speed transport. Furthermore, people have a high desire of leisure time as a standard of living is generally improved, and hence the use of deluxe excursion ships or high-speed passenger ships is increasing.

[3] As the use of vessels is increasing, the vessels are always exposed to various dangers, such as a damage of the body of the vessel generated during a voyage and a breakage of the vessel generated due to a collision of the body of the vessel against a quay when the vessel comes alongside the quay. The breakage of the vessel may cause capsize or sinking of the vessel, and an environmental pollution due to carrying away of goods from the vessel and an inflow of oil, gas and the likes into the sea. As an example, as you can see from the oil-spill at Taean in South Korea, in consideration of pollution of natural environments and a recovery period of the environments, influences of the breakage of the vessel is tremendous.

[4] To overcome such problems, various technologies have been developed to cope with the breakage of the vessel. In the related art, there is a technology provided with a receiving chamber having an air bag and mounted on a side of the body of the vessel and an inclination detector disposed on the body of the vessel, so that the air bag of the receiving chamber expands to improve buoyancy of the vessel by working of a gas generator through an actuator after an operating signal of the inclination detector is sent to the actuator when the body of the vessel is inclined due to a breakage of the body of the vessel, whereby the vessel is prevented from capsize or sinking when the vessel is broken. [5] In addition, there is also a technology for temporarily repairing a damaged part of the vessel by a flexible waterproof sheet expanded through the steps of surrounding the damaged part with the flexible waterproof sheet, fixing the waterproof sheet via a cable, and injecting pressure to the edge of the sheet. Disclosure of Invention Technical Problem

[6] Out of the above-mentioned technologies, the technology to prevent an inclination of the vessel due to the breakage can prevent the capsize and sinking of the vessel, but has several problems in that harmful matters, such as oil and gas, may inflow from the broken area of the vessel into the sea and in that it is difficult to apply it to small-sized vessels since the expensive equipments, such as the inclination detector and the gas generator, are mounted on the outside of the vessel.

[7] Moreover, the technology to repair the broken area of the vessel by fixing the waterproof sheet on the broken area has also several problems in that the waterproof sheet may be torn or damaged due to high pressure in the sea, in that a waterproof efficiency may be deteriorated since the cable fixing the waterproof sheet may get loose due to its low fixing strength when the waterproof sheet is fixed to the broken area via the cable, and in that the work to inject pressure to the waterproof sheet is not performed simply.

[8] Accordingly, there is an urgent need for a technology to repair the vessel, which can easily and urgently repair the vessel and enhance water-tightness of the broken area when the vessel is broken.

Technical Solution

[9] To overcome the problems of the prior arts, the present invention provides a hermetic sealing device for urgently repairing vessels 100 comprising: a close contact part 10 located at the front face thereof and having magnetism to be in close contact with a broken area 40 of the vessel 50 with water-tightness, the close contact part 10 being made of a transformable material; an iron plate part 20 disposed at the back of the close contact part 10 and adapted to raise a fixing force between the close contact part 10 and fixing parts 30 having magnetism, the iron plate part 20 being constructed of a thin plate type to hermetically seal the broken area 40 of the vessel 50 together with the close contact part 10; and the fixing parts 30 disposed at the back of the iron plate part 20 and having magnetism to fix the iron plate part 20 to the close contact part 10 being in close contact with the broken area 40.

[10] Furthermore, the close contact part 10 is constructed of a resin magnet, the iron plate part 20 is made of a metallic material, and the fixing parts 30 are constructed of neodymium magnets.

[11] Moreover, the close contact part 10 has retaining jaws 10a formed at both end portions thereof and the iron plate part 20 has retaining rods 20a formed at both end portions thereof in correspondence to the retaining jaws 10a, so that the retaining rods 20a of the iron plate part 20 are joined to the retaining jaws 10a of the close contact part 10.

[12] In another aspect of the present invention, the present invention provides a hermetic sealing device for urgently repairing vessels comprising: a close contact part 10 located at the front face thereof; an iron plate part 20 disposed at the back of the close contact part 10 and having grooves 60 formed at edges thereof; and a plurality of fixing parts 30 inserted into the grooves 60 of the iron plate part 20.

[13] In a further aspect of the present invention, the present invention provides a hermetic sealing device for urgently repairing vessels comprising: a close contact part 10 located at the front face thereof, the close contact part 10 having grooves 70 formed at edges thereof; and a plurality of fixing parts 30 inserted into the grooves 70 of the close contact part 10.

[14] In a still further aspect of the present invention, the present invention provides a hermetic sealing device for urgently repairing vessels comprising: a close contact part 10 having a through hole (h) formed at the central portion thereof, the close contact part 10 being made of a transformable material; an iron plate part 20 of a thin plate type disposed at the back of the close contact part 10 and having a through hole (h^p) formed at the central portion thereof; a projectedly blocking part 110 of a pocket type, projecting outwardly from the iron plate part 20, the projectedly blocking part 110 having an insertion space (p) formed on one face thereof for inserting a blocking shield (p¹) thereto and a through hole (2h) formed at the central portion thereof; and a plurality of fixing parts 30 disposed at the back of the iron plate part 20 and having magnetism to fix the iron plate part 20 to the close contact part 10 being in close contact with the broken area 40.

[15] The blocking shield (p¹) is made of a stainless steel material (SUS).

[16] The projectedly blocking part 110 of the pocket type is constructed in such a way that a portion including the through hole (h¹) formed at the central portion of the iron plate part 20 of the thin plate type is projected outwardly and the insertion space (p) for inserting the blocking shield (p¹) thereto is formed on the projected side.

[17] In another aspect of the present invention, the present invention provides a hermetic sealing device for urgently repairing vessels comprising: a close contact part 10 having a through hole (h) formed at the central portion thereof, the close contact part 10 being made of a transformable material; an iron plate part 20 of a thin plate type disposed at the back of the close contact part 10 and having a through hole (h¹) formed at the central portion thereof; a rotating plate (s) hingedly mounted to one side of the outside of the close contact part 10 to selectively close the through hole (h); and a plurality of fixing parts 30 disposed at the back of the iron plate part 20 and having magnetism to fix the iron plate part 20 to the close contact part 10 being in close contact with the broken area 40.

[18] The rotating plate (s) is made of a stainless steel material (SUS).

[19] A hand-grip (s¹) formed on one side of the rotating plate (s) projects outwardly from the iron plate part 20 through the through holes (h; h¹)

[20] The close contact part 10 and the iron plate part 20 respectively have dented portions

(H; H') formed at both sides of the through holes (h; h') formed at the central portions thereof in such a way that the hand- grip (s¹) of the rotating plate (s) can be inserted thereto, so that the through holes (h; h') are selectively opened and closed by the rotating plate (s) according to the caught state of the hand-grip (s¹) to the dented portions (H; H') Advantageous Effects

[21] As described above, the hermetic sealing device 100 according to the present invention includes the close contact part 10 being in close contact with the broken area 40 of the vessel, the iron plate part 20, and the fixing parts 30 for fixing the close contact part 10 and the iron plate part 20 to the broken area 40 of the vessel. Since the hermetic sealing device 100 can be in close contact with the broken area and firmly fixed to the broken area when the vessel 50 is broken, the hermetic sealing device 100 can reduce man power for a repairing work owing to a simple repair work, and prevent large-scale accidents by increasing water-tightness of the broken area 40 and allowing workers to urgently cope with the breakage of the vessel 50.

[22] Additionally, the hermetic sealing device 100 according to the present invention can be used semi-permanently since it is constructed of transformable magnets with a good magnetic force, is in close contact with and firmly fixed to the broken area 40 of the vessel 50, and is not damaged. Brief Description of Drawings

[23] FIG. 1 is a perspective view showing a preferable form of a hermetic sealing device according to a preferred embodiment of the present invention.

[24] FIG. 2 is a sectional view showing the preferable form of the hermetic sealing device according to the present invention.

[25] FIG. 3 is an exploded perspective view showing a structure of the hermetic sealing device.

[26] FIGS. 4(a) and 4(b) are exemplary views showing a state where the hermetic sealing device is closely fixed and sealed to a broken area of a vessel according to the present invention.

[27] FIG. 5 is a perspective view showing an example where a close contact part and an iron plate part are joined to each other according to the present invention.

[28] FIGS. 6(a) and 6(b) are sectional views showing another form of the hermetic sealing device according to the present invention.

[29] FIGS. 7 (a) and 7(b) are sectional views showing a further form of the hermetic sealing device according to the present invention.

[30] FIG. 8 is an exploded perspective view showing a still further form of the hermetic sealing device according to another preferred embodiment of the present invention.

[31] FIG. 9 is an exemplary view of FIG. 8.

[32] FIG. 10 is a perspective view showing another preferable form according to a further preferred embodiment of the present invention.

[33] FIG. 11 is an exploded perspective view of FIG. 10.

[34] FIG. 12 is an exemplary view of FIG. 10.

[35] <Explanation of essential reference numerals in drawings>

[36] 10: close contact part 20: iron plate part

[37] 30: fixing part 40: broken area

[38] 50: vessel 60: groove

[39] 70: groove 100: hermetic sealing device

[40] 110: projectedly blocking part

[41] P' blocking shield

[42] s: rotating plate s' hand-grip

[43] H: dented portion

[44]

Best Mode for Carrying out the Invention

[45] The present invention relates to a hermetic sealing device for urgently repairing vessels, and more particularly, to a hermetic sealing device, which is closely fixed to a broken area of the vessel to urgently repair the body of the vessel when the body of the vessel is broken by the external shock or a collision, thereby initially coping with the breakage of the vessel. The hermetic sealing device 100 includes: a close contact part 10 coming in close contact with the broken area of the body of the vessel; an iron plate part 20 mounted at the back of the close contact part 10 for raising a fixing force between the close contact part 10 and fixing parts 30; and the fixing parts 30 for fixing the close contact part 10 and the iron plate part 20 to the broken area 40 of the vessel 50, so that the broken area 40 of the vessel 50 gets watertight in such a way as to prevent an outflow of oil or gas from the broken area 40 when the vessel 50 is broken, whereby the hermetic sealing device 100 can urgently and initially cope with the breakage of the vessel 50 to thereby prevent large-scale accidents, reduce man power for a repairing work due to a simple repairing work, and be used semi-permanently. [46] FIG. 1 is a perspective view showing a preferable form of a hermetic sealing device according to the present invention, FIG. 2 is a sectional view showing the preferable form of the hermetic sealing device according to the present invention, FIG. 3 is an exploded perspective view showing a structure of the hermetic sealing device, FIGS. 4(a) and 4(b) are exemplary views showing a state where the hermetic sealing device is closely fixed and sealed to a broken area of a vessel according to the present invention, FIG. 5 is a perspective view showing an example where a close contact part and an iron plate part are joined to each other according to the present invention, FIGS. 6(a) and 6(b) are sectional views showing another form of the hermetic sealing device according to the present invention, and FIGS. 7(a) and 7(b) are sectional views showing a further form of the hermetic sealing device according to the present invention.

[47] Referring to FIGS. 1 to 3, the hermetic sealing device for repairing vessels according to the present invention will be described in detail.

[48] First, the hermetic sealing device 100 for repairing vessels according to the present invention includes the close contact part 10, the iron plate part 20, and the fixing part 30.

[49] The close contact part 10 is located at the front face of the hermetic sealing device

100 and is in direct contact with the broken area 40 of the vessel 50. The close contact part 10 can be in close contact with the broken area 40 according to forms of the broken area 40, has a magnetic force to enhance water-tightness of the broken area 40 after the close contact part 10 is in close contact with the broken area 40, and is made of a transformable soft material. For this, it is preferable that the close contact part 10 is a resin magnet with elasticity, softness and magnetism.

[50] Since the broken area 40 is small at the early stage of the breakage of the vessel 50, the close contact part 10 has a vertical width of 20cm, a horizontal width of 30cm, and a thickness ranging lmm to 2mm, so that workers can easily carry it in water. Furthermore, the close contact part 10 is formed relatively thin to provide more excellent elasticity and softness, whereby the close contact part 10 can be in close contact with the broken area 40 and provide excellent water-tightness.

[51] The iron plate part 20 is mounted at the back of the close contact part 10 and adapted to raise a fixing force between the close contact part 10 and the fixing part 30, which have magnetism, and seals the broken area 40 together with the close contact part 10.

[52] The iron plate part 20 has the same width as the close contact part 10. It is preferable that the iron plate part 20 is constructed of a thin plate type of about 2mm to have the same elasticity and softness as the close contact part 10.

[53] In order to raise the coupling force between the close contact part 10 and the iron plate part 20, as shown in FIG. 5, the close contact part 10 may have retaining jaws 10a formed at both end portions thereof and the iron plate part 20 may have retaining rods 20a formed at both end portions thereof and corresponding to the retaining jaws 10a, so that the retaining rods 20a of the iron plate part 20 are joined to the retaining jaws 10a of the close contact part 10.

[54] As shown in FIGS. 1 to 3, a number of the fixing parts 30 are mounted at the back of the iron plate part 20. It is preferable that the fixing part 30 is constructed of a member having a strong magnetism to keep a sealed state of the broken area 40 due to the close contact between the close contact part 10 and the iron plate part 20, and it is more preferable that the fixing parts 30 are constructed of neodymium magnets having a magnetic force within a range of 3,000 gauss to raise the fixing force through the strong magnetism.

[55] It is preferable that the fixing part 30 has a diameter of 50mm and 4 to 6 fixing parts

30 are mounted at the back of the close contact part 10 and the iron plate part 20.

[56] A preferred embodiment of the present invention having the above structure will be described.

[57] First, in order to repair the broken area 40 of the vessel 50 using the hermetic sealing device 100 according to the present invention, three workers form a group and conduct operations, and in this instance, two workers perform a work to attach the hermetic sealing device 100 to the broken area 40 and the rest of the three workers checks a correct form of the attachment and dangerous factors in water.

[58] When the vessel 50 is broken, the workers move to the broken area 40 of the vessel

50 to check the broken area 40, and then, as shown in FIG. 4, closely contact the close contact part 10 with the broken area 40 of the vessel 50 downwardly, so that the close contact part 10 having magnetism is fixed to the surface of the vessel 50, which is made of a steel material, by the magnetic force. After that, the fixing parts 30 are individually attached to the back of the close contact part 10 and the iron plate part 20, so that the broken area 40 can be sealed through the close contact part 10 and the iron plate part 20 since the strong magnetic force of the fixing parts 30 is transferred not only to the iron plate part 20 and the close contact part 10 but also to the surface of the vessel 50.

[59] When the hermetic sealing device 100 is completely fixed to the broken area 40 of the vessel 50, the workers check whether or not oil or gas flows out from the broken area 40. The workers disassemble the fixing parts 30 using tools and carry out re- operations if there is any outflow, but withdraw or move to another broken area if there is no outflow.

[60] After the above operation, when cargo- working or voyage is completed, the workers disassemble the hermetic sealing device 100 to carry out a formal repairing work.

[61] Mode for the Invention

[62] Another structure of the hermetic sealing device 100 will be described now.

[63] In order to raise a sealing force of the broken area 40 of the vessel 50 using the hermetic sealing device 100, the fixing parts 30 are in closest contact with the surface of the vessel 50 to thereby transfer the magnetic force of the fixing parts 30 to the surface of the vessel 50. For this, as shown in FIGS. 6(a) and 6(b), the iron plate part 20 has grooves 60 for inserting the fixing parts 30 thereto, so that the fixing parts 30 are mounted close to the surface of the vessel 50, whereby the hermetic sealing device 100 can raise water-tightness of the broken area 40 and be easily fixed to the broken area 40 of the vessel 50 since the fixing parts 30 are located inside the iron plate part 20.

[64] Moreover, as shown FIGS. 7(a) and 7(b), the close contact part 10 has grooves 70 for inserting the fixing parts 30 thereto, whereby the hermetic sealing device 100 can raise the sealing force of the broken area 40 of the vessel 50 and the fixing parts 30 can be easily fixed to the close contact part 10.

[65] In another preferred embodiment of the present invention, a hermetic sealing device for providing an effective sealing against pressure will be described.

[66] As shown in FIGS. 8 and 9, a close contact part 10 includes a through hole (h) formed at the central portion thereof and an iron plate part 20 also includes a through hole (h¹) formed at the central portion thereof, and then, the through holes (h and h') are united in such a way as to correspond with each other.

[67] After that, a projectedly blocking part 110 of a pocket type, which includes a through hole (2h) formed at the central portion thereof corresponding to the through hole (h¹) of the iron plate part 20 and an insertion space (p) formed on one face thereof in an opened type, is mounted on the iron plate part 20 and a blocking shield (p¹) is inserted into the insertion space (p) to thereby block off jetting matters. Of course, the uniting among the close contact part 10, the iron plate part 20 and the projectedly blocking part 110 can be achieved through one of various well-known technologies, such as welding, screw-coupling, bonding, and so on. As described in the first preferred embodiment, fixing parts 30 having magnetism to fix the iron plate part 20 to the close contact part 10, which is in close contact with the broken area 40, are disposed in the same way as the first preferred embodiment.

[68] Furthermore, a portion including the through hole (h¹) formed at the central portion of the iron plate part 20 may be forcedly projected to the outside through an extrusion or the like, and then, the insertion space (p) for inserting the blocking shield (p¹) thereto may be formed on the projected side.

[69] In order to prevent a separation of the blocking shield (p¹) by the magnetic force of the fixing parts 30 when the blocking shield (p^τ) is inserted and fixed into the pro- jectedly blocking part 110, it is preferable that the blocking shield (p¹) is made of a stainless steel material (SUS).

[70] In a further preferred embodiment of the present invention, a hermetic sealing device for providing an effective sealing against pressure will be described.

[71] As shown in FIGS. 10, 11 and 12, a close contact part 10 includes a through hole (h) formed at the central portion thereof and dented portions (H) formed at both sides of the through hole (h) for inserting a hand-grip (s¹) of a rotating plate (s), which will be described later, thereto.

[72] Moreover, an iron plate part 20 also includes a through hole (h¹) formed at the central portion thereof and dented portions (H') formed at both sides of the through hole (h^p) for inserting a hand-grip (s¹) of a rotating plate, which will be described later, thereto in the same way as the close contact part 10. In this instance, the through holes (h and h') and the dented portions (H and H¹) are disposed correspondingly with each other.

[73] Accordingly, the rotating plate (s) hingedly mounted to one side of the outside of the close contact part 10 can selectively close up the through holes (h and h')

[74] If necessary, in order to make the rotation easy, the hand-grip (s¹) may be separately formed on the rotating plate (s) in such a way as to project outwardly from the through holes (h and h¹) in such a way that the hand-grip (s¹) can be caught to the dented portions (H and H')

[75] Accordingly, the rotating plate (s) is moved from the through holes (h and h') according to the caught state of the hand-grip (s¹), so that the through holes (h and h¹) are selectively opened and closed by the rotating plate (s) to thereby achieve a smooth working.

[76] Additionally, it is preferable that the rotating plate (s) is made of a stainless steel material (SUS) in order to prevent a separation of the rotating plate (s) by the magnetic force of the fixing parts 30.

[77]

Claims

[1] A hermetic sealing device for urgently repairing vessels comprising: a close contact part (10) located at the front face thereof and having magnetism to be in close contact with a broken area (40) of the vessel (50) with water- tightness, the close contact part (10) being made of a transformable material; an iron plate part (20) disposed at the back of the close contact part (10) and adapted to raise a fixing force between the close contact part (10) and fixing parts (30) having magnetism, the iron plate part (20) being constructed of a thin plate type to hermetically seal the broken area (40) of the vessel (50) together with the close contact part (10); and the fixing parts (30) disposed at the back of the iron plate part (20) and having magnetism to fix the iron plate part (20) to the close contact part (10) being in close contact with the broken area (40).

[2] The hermetic sealing device according to claim 1 , wherein the close contact part

(10) is constructed of a resin magnet, the iron plate part (20) is made of a metallic material, and the fixing parts (30) are constructed of neodymium magnets.

[3] The hermetic sealing device according to claim 1, wherein the close contact part

(10) has retaining jaws (10a) formed at both end portions thereof and the iron plate part (20) has retaining rods (20a) formed at both end portions thereof in correspondence to the retaining jaws (10a), so that the retaining rods (20a) of the iron plate part (20) are joined to the retaining jaws (10a) of the close contact part (10).

[4] A hermetic sealing device for urgently repairing vessels comprising: a close contact part (10) located at the front face thereof; an iron plate part (20) disposed at the back of the close contact part (10) and having grooves (60) formed at edges thereof; and a plurality of fixing parts (30) inserted into the grooves (60) of the iron plate part (20).

[5] A hermetic sealing device for urgently repairing vessels comprising: a close contact part (10) located at the front face thereof, the close contact part (10) having grooves (70) formed at edges thereof; and a plurality of fixing parts (30) inserted into the grooves (70) of the close contact part (10).

[6] A hermetic sealing device for urgently repairing vessels comprising: a close contact part (10) having a through hole (h) formed at the central portion thereof, the close contact part (10) being made of a transformable material; an iron plate part (20) of a thin plate type disposed at the back of the close contact part (10) and having a through hole (h¹) formed at the central portion thereof; a projectedly blocking part (110) of a pocket type, projecting outwardly from the iron plate part (20), the projectedly blocking part (110) having an insertion space

(p) formed on one face thereof for inserting a blocking shield (p¹) thereto and a through hole (2K) formed at the central portion thereof; and a plurality of fixing parts (30) disposed at the back of the iron plate part (20) and having magnetism to fix the iron plate part (20) to the close contact part (10) being in close contact with the broken area (40).

[7] The hermetic sealing device according to claim 6, wherein the blocking shield

(p¹) is made of a stainless steel material (SUS).

[8] The hermetic sealing device according to claim 6, wherein the projectedly blocking part (110) of the pocket type is constructed in such a way that a portion including the through hole (h¹) formed at the central portion of the iron plate part (20) of the thin plate type is projected outwardly and the insertion space (p) for inserting the blocking shield (p¹) thereto is formed on the projected side.

[9] A hermetic sealing device for urgently repairing vessels comprising: a close contact part (10) having a through hole (h) formed at the central portion thereof, the close contact part (10) being made of a transformable material; an iron plate part (20) of a thin plate type disposed at the back of the close contact part (10) and having a through hole (h¹) formed at the central portion thereof; a rotating plate (s) hingedly mounted to one side of the outside of the close contact part (10) to selectively close the through hole (h); and a plurality of fixing parts (30) disposed at the back of the iron plate part (20) and having magnetism to fix the iron plate part (20) to the close contact part (10) being in close contact with the broken area (40).

[10] The hermetic sealing device according to claim 9, wherein the rotating plate (s) is made of a stainless steel material (SUS).

[11] The hermetic sealing device according to claim 10, wherein a hand-grip (s¹) formed on one side of the rotating plate (s) projects outwardly from the iron plate part (20) through the through holes (h; h')

[12] The hermetic sealing device according to claim 11, wherein the close contact part

(10) and the iron plate part (20) respectively have dented portions (H; H¹) formed at both sides of the through holes (h; h') formed at the central portions thereof in such a way that the hand-grip (s¹) of the rotating plate (s) can be inserted thereto, so that the through holes (h; h') are selectively opened and closed by the rotating plate (s) according to the caught state of the hand-grip (s^τ) to the dented portions (H; H¹)