Abstract:
PURPOSE: A manufacturing method of prepreg is provided to solve existing various problems like graphite-residues remained in a mold, a problem not able to control a thickness of a graphite layer, etc. CONSTITUTION: A manufacturing method of prepreg comprises: a step of providing carbon long fiber-reinforced prepreg in a semi-cured sheet state which is reinforced by using a polymer resin as a base, and by a carbon material; a step of laminating a release film in which a graphite foil is coated on the prepreg; and a step of manufacturing final prepreg coated with the graphite foil by transferring the graphite foil on a surface of the prepreg through a high-temperature pressing process passing the prepreg through a hot roller(107).
Abstract:
본 발명은 굴곡부를 가지는 금속멤브레인의 충격시험장치를 개시한다. 본 발명은 굴곡부를 가지는 금속 멤버레인의 굴곡부를 덮을 수 있도록 굴곡부를 수용하는 수용공간을 가지는 터널형 하우징과, 금속 멤브레인을 지지하도록 터널형 하우징에 결합되는 베이스와, 터널형 하우징의 내면과 굴곡부의 외면 사이에 배치되도록 수용공간에 설치되고 유체를 수용하기 위한 챔버 및 유체가 주입되도록 챔버와 연결된 주입구가 형성되어 있으며 챔버 내부의 압력변화에 따라 외형이 변형될 수 있는 가변형 몸체를 갖는 압력백과, 압력백을 팽창시켜 굴곡부를 가압할 수 있도록 주입구를 통해 챔버에 유체를 공급하며 굴곡부에 압력펄스를 부여하는 충격수단을 구비하는 것이 그 특징이다. 충격수단은 터널형 하우징의 상부에 결합되며 주입구를 통하여 압력백에 유체를 공급하는 유압실린더와, 유압실린더의 내부에서 이동가능하도록 설치되며 주입구의 방향으로 순간적으로 이동하여 굴곡부에 압력펄스를 부여하는 피스톤과, 유압실린더의 측면에 설치되는 릴리프밸브와, 유압실린더의 측면에 설치되어 유압실린더의 압력을 감지하는 압력게이지를 구비한다. 본 발명에 의하면, 터널형 하우징, 압력백, 충격수단 등의 간단한 치구 및 장비를 이용하여 굴곡부를 갖는 금속멤브레인의 충격 특성에 대해 간단하게 시험 평가할 수 있다. 멤브레인, 충격, 내압, 시험
Abstract:
PURPOSE: An insulating structure and an ultra low liquid storage tank comprising the same are provided to enhance the bonding reliability of a strip by effectively preventing bending deformation due to load applied to the strip when the strip is constructed. CONSTITUTION: An insulating structure for an ultra low liquid storage tank comprises a plurality of outer insulating panels(121), a first strip(135), a second strip(136), a plurality of inner insulating panels, a plurality of bridge insulating panels, and a first wall. The outer insulating panels cover the inner wall of the tank. The first strip covers the first gap between two outer insulating panels, which are arranged to face each other in a first direction. The second strip covers the second gap between two outer insulating panels, which are arranged to face each other in a second direction crossing the first direction.
Abstract:
본 발명에 의한 액화천연가스 저장탱크의 용접불량 검출방법은, 액화천연가스가 저장된 저장공간을 기밀시키기 위해 저장공간을 단열시키기 위한 단열층에 결합된 방벽의 용접 부위에서 용접불량을 검출하기 위한 것으로, a) 단열층과 방벽의 사이에 검출용 기체를 주입하는 단계와, b) 검출용 기체를 감지하여 감지신호를 발생할 수 있는 기체 감지장치를 용접 부위에 접근시켜서 용접 부위 주위의 공기 중에 누출된 검출용 기체가 존재하는지 용접 부위 주위의 공기를 감시(Monitoring)하는 단계를 포함한다. 본 발명에 의하면, 검출용 기체와 이를 감지할 수 있는 기체 감지장치를 이용함으로써 1차 방벽의 넓은 용접 부위에 대해 용접불량을 쉽고 효율적으로 검출할 수 있다.
Abstract:
PURPOSE: A separator for a polymer electrolyte membrane fuel cell is provided to lower electricity contact resistance and to reduce energy loss by smoothening water circulation through reaction by increasing a hydrophilic property of the separator surface. CONSTITUTION: A method for manufacturing a separator for a polymer electrolyte membrane fuel cell comprises the steps of: supplying prepreg(10) and graphite foil(11); cutting the prepreg and graphite foil in a longitudinal direction of the separator to be manufactured; compressing the cut prepreg and graphite foil; heating and pressurizing the prepreg in which graphite foil is laminated in one body to form hydrogen, air, and cooling water channels through high temperature press(22), or passing through a hot roll press to prepare a separator(30); cutting unnecessary parts from a heated and pressurized separator; and performing post-curing treatment of the manufactured separator.
Abstract:
PURPOSE: A joint device is provided to reduce a dead volume of an end plate and to pressurize and join the end plate through predetermined virtual pressure regardless of the length of a stack. CONSTITUTION: A fuel cell stack(100) includes: an electricity generating assembly(10) in which a plurality of unit cells(11) are consecutively arranged; end plates(30,40) which are closely arranged at both sides of the electricity generating assembly; and a joint device(200) which joins the end plates by a steel rope(111), pressurizes the electricity generating assembly by the tension of the steel rope, and enables the control of the length and tension of the steel rope.
Abstract:
PURPOSE: An insulation structure and a cryogenic liquid storage tank with the same are provided to improve the reliability and thermal insulating function of product by increasing the resistivity against the pressure of the cryogenic liquid. CONSTITUTION: An insulation structure comprises an outer insulation layer(120), an inner insulation layer(140), and a main barrier wall(160). The outer insulation layer is located on the inside wall of a tank in order to cover the inside wall of the tank. A plurality of outer heat-insulating panels(121), which has an inner space made of composite material is formed in the outer insulation layer. The inner insulation layer is installed in the outer insulation layer in order to cover the outer insulation layer. A plurality of inner heat-insulating panels(141), which has an inner space made of composite material is formed in the inner insulation layer. The main barrier wall is located on the top of the inner insulation layer in order to prevent the inflow of cryogenic liquid into the inner insulation layer. A plurality of corrugation part(161) protruding towards the inner insulation layer is form in the main barrier wall.
Abstract:
PURPOSE: A shock test device of a metal membrane with a curved part is provided to enable the shock property of a metal membrane to be easily recognized using simple jig and equipment. CONSTITUTION: A shock test device(100) of a metal membrane with a curved part comprises a housing(40), a base(20), a pressure bag and a shock unit(70). The housing comprises a space for holding a curved part. The base is coupled to the housing to support the metal membrane(10). The pressure bag is installed in the space to be arranged between the inner surface of the housing and the outer surface of the curved part. The pressure bag comprises a variable body(62), of which shape is varied according to the pressure change in a chamber. The shock unit applies pressure pulse to the curved part.
Abstract:
PURPOSE: An insulation structure and a cryogenic liquid storage tank having the same are provided to obtain excellent resistance to the pressure of a cryogenic liquid by being inserted into a receiving groove which is formed on an insulating panel. CONSTITUTION: An insulation structure(11) of a cryogenic liquid storage tank is combined with the inner side of a tank wall(10) of the cryogenic liquid storage tank. The insulation structure insulates a storage space in which a cryogenic liquid is stored. The insulation structure comprises: an insulating panel(12) which is combined with the tank wall to prevent thermal transfer between the tank wall and the storage space and includes a plurality of receiving grooves(23); and a main barrier(13) having a plurality of wrinkles parts(26) which are inserted into the multiple receiving grooves.