KR102020286B1 - Gas leakage prevention device for gas container bosses - Google Patents

Gas leakage prevention device for gas container bosses Download PDF

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Publication number
KR102020286B1
KR102020286B1 KR1020190008683A KR20190008683A KR102020286B1 KR 102020286 B1 KR102020286 B1 KR 102020286B1 KR 1020190008683 A KR1020190008683 A KR 1020190008683A KR 20190008683 A KR20190008683 A KR 20190008683A KR 102020286 B1 KR102020286 B1 KR 102020286B1
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KR
South Korea
Prior art keywords
inner body
pressing
gas
groove
gas container
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KR1020190008683A
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Korean (ko)
Inventor
임광훈
임은정
Original Assignee
(주)광운기업
한국이라체(주)
임은정
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/002—Details of vessels or of the filling or discharging of vessels for vessels under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0305—Bosses, e.g. boss collars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/21—Shaping processes
    • F17C2209/2109—Moulding
    • F17C2209/2118—Moulding by injection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/035—Propane butane, e.g. LPG, GPL
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/03—Dealing with losses
    • F17C2260/035—Dealing with losses of fluid
    • F17C2260/036—Avoiding leaks

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The present invention provides a gas leakage prevention device of a nozzle boss of a high-pressure gas container which can be coupled to a lower portion where an outside body and an inner body are coupled by a compression method to reliably prevent concern for a leakage of gas between the inner body and the outside body. A nozzle boss of a gas container comprises: an inner body of a metallic material forming a first and a second insertion groove on a circumference of an outer surface of an upper portion having a rectangular shape; an outside body integrally coupled to a circumference of an outer surface of the inner body to be formed by injection molding; and a plug coupled to a lower portion of a through hole formed on a center of the inner body. A bent unit having a pressing groove is formed on an inner side where a lower portion of the inner body is bent outwards to have a U-shape. A first squeezing unit is formed by pressing the bent unit by a pressing jig from the outside while the outside body formed on the inner body by insert injection molding is integrally coupled to be inserted into the pressing groove.

Description

가스용기용 노즐 보스의 가스 누출 방지장치{Gas leakage prevention device for gas container bosses}Gas leakage prevention device for gas container bosses

본 발명은 가스용기용 노즐 보스의 가스 누출 방지장치에 관한 것으로, 좀 더 상세하게는 금속재질의 인너바디에 합상수지재질의 아웃사이드바디를 인서트 사출성형으로 형성하는 노즐 보스에 이질의 경계사이로 가스의 누출을 방지할 수 있도록 하는 가스용기용 노즐 보스의 가스 누출 방지장치에 관한 것이다.The present invention relates to a gas leakage preventing device of a nozzle boss for a gas container, and more particularly, a gas between heterogeneous boundaries in a nozzle boss for forming an outer body of a synthetic resin material in an insert injection molding on an inner body of a metal material. The present invention relates to a gas leakage preventing device of a nozzle boss for a gas container that can prevent leakage of gas.

용기 중의 액화된 가스(LPG)는 온도가 상승하면 액체가 팽창하는데 액체로 충만되면 약간의 온도 상승이라도 액체 팽창에 의해서 현저히 압력이 높아져서 용기가 파열될 위험을 발생하기 때문에 충전량에 규정이 설정되어 있 액화석유가스 용기에 발생하는 고압을 안전하게 누출을 차단하면서 상당한 기밀성을 유지할 수 있도록 규정하고 있다.The liquefied gas (LPG) in the container expands when the temperature rises, but when it is filled with liquid, even if a slight temperature rise, the pressure is significantly increased due to the liquid expansion, causing the container to rupture. The high pressure generated in the liquefied petroleum gas container is regulated to safely prevent leakage and maintain considerable airtightness.

이러한 액화가스 용기의 라이너를 금속 재질로 제작되었으나 근래에 플라스틱 라이너로 제작이 이루어짐에 따라 용기의 경량화를 이루면서 안전성을 확보할 수 있다.Although the liner of the liquefied gas container is made of a metal material, it is possible to secure safety while making the container lightweight due to the recent production of the plastic liner.

종래기술의 일례로 중심부에 플러그가 나사결합으로 체결되는 노즐 보스가 라이너에 나사결합으로 체결되도록 구성되고 있어 각 나사결합 부분을 통해 고압의 가스가 누출될 우려가 많아 제작시 기밀성을 유지하기 위한 어려움이 있었다.As an example of the prior art, the nozzle boss, which is screwed to the center of the plug, is configured to be screwed to the liner, so that high pressure gas may leak through each screwed part, and thus, it is difficult to maintain airtightness during manufacturing. There was this.

상기 종래기술의 문제점을 감안하여 제안된 선행기술로 등록번호 10-1791095호 "가스용기용 부싱"에 대하여 살펴보면,In consideration of the problems of the prior art, the present invention will be described with reference to Patent No. 10-1791095 "Gas Container Bushing".

상부와 하부가 관통되고, 내주면 상에 결합홈이 형성된 외부체와; An outer body through which the upper and lower parts penetrate, and a coupling groove is formed on the inner circumferential surface;

상기 외부체의 내주면에 형성된 결합홈과 대응되는 형상으로 이루어져 결합되는 결합구를 갖고, 결합구의 하측으로 연장되는 연장부를 갖는 내부체와; An inner body having a coupler formed to have a shape corresponding to a coupling groove formed on an inner circumferential surface of the outer body, and having an extension extending downward of the coupler;

상기 내부체에 체결되어 용기 내부에 충진된 가스를 배출하기 위한 플러그와; A plug fastened to the inner body to discharge gas filled in the container;

상기 내부체의 연장부와 체결되고, 용기 내부에 충진된 가스의 누출을 방지하기 위한 체결부재를 포함하여 이루어진 것이다.Is fastened with the extension of the inner body, it is made to include a fastening member for preventing the leakage of the gas filled in the container.

그러나 상기 선행기술은 다음과 같은 문제점이 있다.However, the prior art has the following problems.

첫째; 노즐 보스를 구성하는 외부체와 내부체를 구성하면서 외부체에 형성한 결합홈에 내부체에 형성한 결합구가 결합되도록 한 것으로 이는 종래기술에서 단순히 나사결합하는 것과 특이한 기술적 효과를 갖지 못하는 것이어서 외부체와 내부체의 사이로 가스가 누출되는 것을 확실하게 방지할 수 있는 대안으로 제공될 수 없는 것이다.first; The coupling groove formed in the inner body is coupled to the coupling groove formed in the outer body while constituting the outer body and the inner body constituting the nozzle boss, which is simply screwed in the prior art and does not have an unusual technical effect. It can not be provided as an alternative to reliably prevent the leakage of gas between the sieve and the inner body.

둘째; 내부체에 하방부로 돌출되는 연장부에 오링을 끼운 후 나사결합으로 체결부재인 너트로 체결하여 가스누출을 방지하고 있으나 오링은 고무 등 탄성력을 갖는 재질로 장기간 지나면 경화현상 등으로 탄력성의 떨어져 누출을 방지하는 효과가 저하되고 선택적으로 교체할 수 있으나 분해 조립할 경우 기밀성이 유지되지 못하는 등의 문제점이 있으며, 이러한 문제로 고압 가스용기에는 오링을 적용하지 않고 제작하는 것이 추세이다.second; The O-ring is inserted into an extension part projecting downward to the inner body, and then screwed together to prevent gas leakage by fastening with a nut, which is a fastening member. However, O-ring is an elastic material such as rubber. There is a problem that the effectiveness of the prevention is reduced and can be replaced selectively, but when the assembly is disassembled, the airtightness is not maintained. Due to this problem, a high pressure gas container is manufactured without applying an O-ring.

본 발명은 상기한 종래의 문제점을 해결하기 위하여 제안된 것으로, 아웃사이드바디와 인너바디의 결합되는 하방부에 압착방식에 결합될 수 있도록 하여 인너바디와 아숫사이드바디의 사이로 가스가 누출될 우려를 확실하게 방지할 수 있도록 하는 고압 가스용기용 노즐 보스의 가스 누출 방지장치를 제공함에 있다.The present invention has been proposed in order to solve the above-mentioned problems, and it is possible to be coupled to the compression method in the lower portion of the outer body and the inner body coupled to the possibility of gas leakage between the inner body and the assam side body. The present invention provides a gas leak preventing device for a nozzle boss for a high pressure gas container that can be reliably prevented.

본 발명은 상기 목적을 구현하기 위한 해결수단에 대하여 설명한다.The present invention describes a solution for implementing the above object.

각체 형상을 갖는 상부의 외면 둘레에 일정간격을 두고 내입홈을 형성하면서 원통 형상을 갖는 하방부의 둘레에 내입홈을 형성하는 금속재질의 인너바디; 상기 인너바디의 외면 둘레를 인서트 사출성형에 의해 감싸도록 매입시키어 형성하는 아웃사이드바디; 상기 인너바디의 중앙부에 형성한 통공의 하방부에 체결되는 플러그를 포함하는 가스용기용 노즐 보스에 있어서,An inner body of metal material forming an inner groove around the lower portion having a cylindrical shape while forming an inner groove at a predetermined interval around the outer surface of the upper portion having a rectangular shape; An outer body formed by embedding the inner circumference of the inner body to be wrapped by insert injection molding; In the gas boss nozzle boss comprising a plug fastened to a lower portion of the through-hole formed in the center portion of the inner body,

상기 인너바디의 하방부의 하단을 외측으로 절곡시킨 형상으로 절곡부를 형성하여 절곡부 내에 압입홈을 형성함과,Forming an indentation groove in the bent portion by forming a bent portion in a shape in which the lower end of the lower portion of the inner body is bent outwardly;

상기 인너바디에 인서트 사출성형으로 형성되는 아웃사이드바디가 상기 내입홈에 내입되게 일체로 형성한 상태에서 상기 절곡부를 외측에서 가압지그로 가압시키어 제1압지부를 형성함을 특징으로 한다.The first body is formed by pressing the bent portion from the outside with a pressure jig in a state in which the outer body formed by insert injection molding in the inner body is integrally formed to be in the indentation groove.

또, 상기 아웃사이드바디의 하방부 둘레에 끼워지는 압지링을 압입시키어 제2압지부를 형성함을 특징으로 한다.In addition, it is characterized in that the press-fit ring which is fitted around the lower portion of the outer body is press-fitted to form a second presser.

본 발명은 인너바디와 인서트 사출성형에 의해 결합되는 아웃사이드바디의 하방부를 제1,2압지부에 의해 압착되어짐에 따라 인너바디와 아웃사이드바디의 사이로 가스가 누출될 수 있는 우려를 확실하게 방지할 수 있는 효과가 있고 그에 따라 제품의 신뢰성을 향상시킬 수 있는 것이다.The present invention reliably prevents the possibility of gas leakage between the inner body and the outer body as the lower portion of the outer body coupled by the inner body and the insert injection molding is compressed by the first and second presses. This can be done and thus improves the reliability of the product.

도 1은 본 발명의 구성을 보인 단면도
도 2는 본 발명의 설치상태를 예시한 단면도
도 3은 본 발명에서 인너바디의 구성을 보인 단면도
도 4는 본 발명에서 제1압지부의 압지 전 상태를 보인 단면도
도 5는 본 발명에서 제1압지부의 압지 후 상태를 보인 단면도
도 6은 본 발명에서 제2압지부의 압지 전 상태를 보인 단면도
도 7은 본 발명에서 제2압지부의 압지 후 상태를 보인 단면도1 is a cross-sectional view showing the configuration of the present invention
Figure 2 is a cross-sectional view illustrating an installation of the present invention
Figure 3 is a cross-sectional view showing the configuration of the inner body in the present invention
Figure 4 is a cross-sectional view showing a state before the first pressing portion of the pressing unit in the present invention
Figure 5 is a cross-sectional view showing a state after the first pressing the pressing portion in the present invention.
Figure 6 is a cross-sectional view showing a state before the second pressing portion of the pressing unit in the present invention
Figure 7 is a cross-sectional view showing a state after the second pressing portion of the pressure holding in the present invention

본 발명은 다양한 변형 및 여러 가지 실시예를 가질 수 있는 바, 그중 특정 실시예를 상세한 설명과 도면의 예시를 통하여 보다 상세하게 설명하고자 한다. The present invention may have various modifications and various embodiments, and specific embodiments will be described in more detail with reference to the detailed description and examples of the drawings.

이하, 본 발명의 바람직한 실시예를 첨부된 도면을 참조하여 상세히 설명하기로 한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 구성을 보인 단면도이고, 도 2는 본 발명의 설치상태를 예시한 단면도로 이 도면에 의해 설명하면,1 is a cross-sectional view showing the configuration of the present invention, Figure 2 is a cross-sectional view illustrating the installation state of the present invention described by this figure,

노즐 보스는,Nozzle boss,

다각체 형상을 갖는 상부의 외면 둘레에 일정간격을 두고 제1내입홈(11)을 형성하면서 원통 형상을 갖는 하방부의 둘레에 제2내입홈(12)을 형성하는 인너바디(10)와,Inner body 10 for forming the second inner groove 12 around the lower portion having a cylindrical shape while forming the first inner groove 11 at a predetermined interval around the outer surface of the upper portion having a polygonal shape,

상기 인너바디(10)의 외면 둘레에 인서트 사출성형에 의해 일체로 결합되어져 형성하는 이종 재질의 아웃사이드바디(20)와, The outer body 20 of the heterogeneous material formed by being integrally coupled to the outer surface of the inner body 10 by the injection molding injection molding,

상기 인너바디(10)의 중앙부에 형성한 관통 체결공의 하방부에 체결되는 플러그(30);를 포함하여 이루어진다.It comprises a; plug 30 is fastened to the lower portion of the through-fastening hole formed in the central portion of the inner body (10).

상기 인버바디(10)에 아웃사이드바디(20)를 인서트 사출성형에 의해 일체로 형성되면 합성수지 재질 등 이종재질의 아웃사이드바디(20)가 인너바디(10)의 외면의 각각의 내입홈(11,12)에 끼워진 것과 같이 일체로 결합된 구성으로 이루어지는 것으로 이는 일반적인 인서트 사출성형 방식에 의한 것이다.When the outer body 20 is integrally formed on the inver body 10 by insert injection molding, the outer body 20 of the dissimilar material such as a synthetic resin is formed in each recess 11 of the outer surface of the inner body 10. , 12) consists of a unitary coupling configuration, such as by insert injection molding in general.

상기 노즐 보스(B)는 가스용기(50)와 일체로 결합되면서 그 내부의 라이너(60)와 융착 등에 의해 일체로 결합되어 구비된다.The nozzle boss B is integrally coupled with the gas container 50 and integrally coupled with the liner 60 therein by fusion or the like.

도 3은 본 발명에서 인너바디의 구성을 보인 단면도이고, 도 4는 본 발명에서 제1압지부의 압지 전 상태를 보인 단면도이고, 도 5는 본 발명에서 제1압지부의 압지 후 상태를 보인 단면도로 이들 도면에 의해 설명하면,Figure 3 is a cross-sectional view showing the configuration of the inner body in the present invention, Figure 4 is a cross-sectional view showing a state before the first pressing portion in the present invention, Figure 5 shows a state after the pressing of the first pressing portion in the present invention. Explained by these figures in cross section,

상기 인너바디(10)의 하방부의 하단을 외측으로 절곡시킨 "U"형상으로 안쪽에 압입홈(14)을 갖는 절곡부(13)를 형성한다.A bent portion 13 having a press-fit groove 14 therein is formed in a “U” shape in which the lower end of the lower portion of the inner body 10 is bent outwardly.

상기 인너바디(10)에 인서트 사출성형으로 형성되는 아웃사이드바디(20)가 상기 압입홈(14)에 내입되도록 일체로 결합한 상태에서 상기 절곡부(13)를 외측에서 가압 지그로 가압시키어 제1압지부(p1)를 형성한다.Pressing the bent portion 13 from the outside with a pressure jig in a state in which the outer body 20 formed by insert injection molding in the inner body 10 is integrally coupled to be inserted into the indentation groove 14, and then pressurized by a first jig. The paper holding part p1 is formed.

이와 같이 절곡부(13)에 형성한 압입홈(14)에 아웃사이드바디(20)의 하단부가 내입된 상태로 인서트성형이 이루어지게 한 후 금속재질로 가공되는 인너바디(10)의 절곡부(13)의 외측 둘레면을 가입시키어 주면 절곡부(13) 외면이 눌러지게 됨에 따라 압입홈(14)에 내입된 합성수지 재질의 아웃사이드바디(20)의 하단부가 압입되어져 이 압입부분의 인너바디(10)와 아웃사이드바디(20)가 더욱 압착력이 가해져 그 사이에 발생할 수 있는 미세 틈새를 확실하게 제거할 수 있어 가스 누출의 우려를 방지할 수 있는 것이다.As described above, the insert molding is performed while the lower end of the outer body 20 is inserted into the press-fit groove 14 formed in the bent portion 13, and then the bent portion of the inner body 10 which is processed into a metal material ( When the outer circumferential surface of 13) is joined, as the outer surface of the bent portion 13 is pressed, the lower end of the outer body 20 of the synthetic resin material inserted into the indentation groove 14 is press-fitted and the inner body of the indentation portion 10) and the outside body 20 is more pressing force can be reliably remove the micro-gaps that can occur between it can prevent the risk of gas leakage.

도 6은 본 발명에서 제2압지부의 압지 전 상태를 보인 단면도이고, 도 7은 본 발명에서 제2압지부의 압지 후 상태를 보인 단면도로 이들 도면에 의해 설명하면,FIG. 6 is a cross-sectional view showing a state before the second pressing portion is pressed in the present invention, and FIG. 7 is a cross-sectional view showing the state after pressing the second pressing portion in the present invention.

상기 아웃사이드바디(20)의 하방부 둘레에 끼워지도록 구비하는 압지링(40)을 외측에서 가압 지그 등으로 가입으로 압입시키는 제2압지부(p2)를 형성한 것이다.A second pressure holding part p2 is formed to press-fit the holding ring 40 provided to be fitted around the lower portion of the outer body 20 with a pressing jig or the like from the outside.

이와 같은 상기 제2압지부(p2)는 압지링(40)이 접촉되는 부분의 아웃사이드바디(20)가 압입에 의해 내측으로 강하게 가압되면서 금속재질의 인너바디(10)와 일체의 결합력이 더욱 강해지게 되어 이 부분에 기밀성의 향상을 더욱 증대시킬 수 있어 가스누출의 우려를 2차적으로 방지할 수 있는 것이다. The second press portion p2 has an integral coupling force with the inner body 10 of the metal material while the outside body 20 of the portion where the press ring 40 is in contact is strongly pressed inward by the press-fitting. It becomes stronger and can further improve the airtightness in this area, which can prevent secondary gas leakage.

10: 인너바디
11,12: 내입홈 13: 절곡부
14: 압착홈
20: 아웃사이드바디
30: 플러그
40: 압지링
p1: 제1압지부
p2: 제2압지부10: Inner Body
11,12: inset groove 13: bend
14: crimp groove
20: Outside Body
30: plug
40: holding ring
p1: first pressing member
p2: second presser

Claims (2)

다각체 형상을 갖는 상부의 외면 둘레에 복수 개의 내입홈을 형성하는 금속재질의 인너바디와, 상기 인너바디의 외면 둘레에 인서트 사출성형에 의해 일체로 결합되어져 형성하는 아웃사이드바디와, 상기 인너바디의 중앙부에 형성한 통공의 하방부에 체결되는 플러그;를 포함하여 구성하는 가스용기용 노즐 보스에 있어서,
상기 인너바디의 하단부 둘레를 가압하여 인너바디와 아웃사이드바디 사이를 밀폐시키도록 하는 제1압지부는 인너바디의 하방부의 하단을 "U"형상을 갖도록 외측으로 절곡시켜 안쪽에 압입홈을 갖는 절곡부를 형성하면서 상기 압입홈에 사출성형하는 아웃사이드바디의 하단부가 압입홈에 내입되도록 일체로 결합한 상태에서 상기 절곡부의 외측면을 가압시키어 압입되도록 함과,
상기 아웃사이드바디의 하방부 둘레에 끼워지는 압지링을 외측에서 가입시키어 압입되는 제2압지부를 형성함을 특징으로 하는 가스용기용 노즐 보스의 가스 누출 방지장치.Inner body of a metal material forming a plurality of inner grooves around the outer surface of the upper portion having a polygonal shape, and an outer body formed integrally coupled to the outer surface of the inner body by insert injection molding, and the inner body In the nozzle boss for a gas container comprising a; plug fastened to the lower portion of the through hole formed in the center of the,
The first pressing portion for pressing the circumference of the lower end of the inner body to seal between the inner body and the outer body is bent outwardly to have a "U" shape of the lower end of the lower body of the inner body to have an indentation groove therein. Pressing by pressing the outer surface of the bent portion in a state in which the lower end of the outer body injection molded into the press-in the groove while being integrally coupled to be in the press-in groove while forming a portion,
Gas leakage preventing device of the nozzle boss for a gas container, characterized in that the second pressure holding portion is formed by joining the holding ring to be fitted around the lower portion of the outer body from the outside. 삭제delete
KR1020190008683A 2019-01-23 2019-01-23 Gas leakage prevention device for gas container bosses KR102020286B1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07113486A (en) * 1993-08-24 1995-05-02 Orii Corp Pipe coupling and spreading tool for joining pipe coupling
KR20160033294A (en) * 2014-09-17 2016-03-28 엘지디스플레이 주식회사 Structure for fixing pem nut
KR20170071969A (en) * 2015-12-16 2017-06-26 현대자동차주식회사 Multi-sealed nozzle and pressure vessel comprising the same
KR101791095B1 (en) * 2017-01-17 2017-10-27 강계홍 Bushing for gas containers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07113486A (en) * 1993-08-24 1995-05-02 Orii Corp Pipe coupling and spreading tool for joining pipe coupling
KR20160033294A (en) * 2014-09-17 2016-03-28 엘지디스플레이 주식회사 Structure for fixing pem nut
KR20170071969A (en) * 2015-12-16 2017-06-26 현대자동차주식회사 Multi-sealed nozzle and pressure vessel comprising the same
KR101791095B1 (en) * 2017-01-17 2017-10-27 강계홍 Bushing for gas containers

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