摘要:
A method and apparatus for facilitating insulation of cryogenic devices such as piping, dewars, tanks, superconducting assemblies and the like. A sleeve having a generally circular cross-section and a diameter slightly larger than the cryogenic device is fabricated from a material preferably having low thermal emissivity and covered with the required thickness of insulation so that what the insulated sleeve with the device installed inside is placed into a housing or jacket the required heat leak from the device when in use is achieved.
摘要:
A method for the preparation of optical ferrules containing cylindrical members utilizes a guide receiving the cylindrical member, a sleeve receiving a piston therethrough, and a pin extending into the sleeve. The method also includes biasing to position the piston, using fill gates to dispense polymer into a defined cavity, and employing a containment which secures the components together. Injection molded optical fiber ferrules made according to the apparatus and process exhibit superior properties.
摘要:
A vacuum insulated panel having high thermal insulating value and long vacuum life, and a method of making such a panel are disclosed. The panel is formed of peripherally welded metal wall members which define a cavity within which, in one embodiment, a compressed block of particulate material is disposed. The particulate material, in this embodiment, serves as a barrier to radiant thermal transmission through the panel, acts as a getter to maintain the vacuum in the panel, and supports the walls of the panel against collapse when the cavity is evacuated. The vacuum insulated panel can be covered with a polyurethane foam insulating material. According to a further embodiment of the invention, the filler within the cavity is a sandwich comprising a compressed layer of particulate material suspended between two layers of fiberglass. In such further embodiment, the layer of particulate material, which can be compressed in situ, serves as a getter and a barrier to radiant thermal transmission, while the fiberglass, making up the overall majority of the filler of the cavity, provides support for the panel members defining the cavity upon evacuation.
摘要:
A device for controlled insulation of a thermal device. The device includes a thermal jacket with a closed volume able to be evacuated to form an insulating jacket around the thermal source. A getter material is in communcation with the closed volume of the thermal jacket. The getter material can absorb and desorb a control gas to control gas pressure in the volume of the thermal jacket to control thermal conductivity in the thermal jacket.
摘要:
Insulating panels or plates are formed along their opposite longitudinal edges with a cylindrically segmental projection and a cylindrically segmental groove receiving the projection, both of these formations being preferably formed as extruded polyvinyl chloride shells. The arc length of the groove is greater than 180.degree. but less than that of the projection so that the plates can be interfitted and angularly offset to fit around a vessel, the angular adjustability allowing the plates to be accommodated to greater and lesser curvatures of the vessel.
摘要:
An arrangement for manufacturing curved wall portions of a heat insulating wall, and particularly for cutting a block of heat-insulating synthetic foam material over a contour embracing a section of a container surface to be insulated, has a chain saw with a cutting tool which slides along an outer edge of a flexible web and has a turning axes in which it is driven for running, a drive for running the cutting tool along the outer edge of the flexible web and including two rotary elements, upright guiding elements each located at a respective end of the chain saw and arranged to guide the latter for upward and downward movements between a plurality of upright positions, a drive for displacing the chain saw in an upright direction and including two displacing elements arranged to act upon a respective end of the chain saw in synchronism with one another, a drive for inclining the turning axes of the cutting tool of the chain saw relative to one another and about a horizontal axis extending in a cutting direction between a plurality of inclined positions, and a drive for moving the block in vertical and horizontal directions relative to the chain saw.
摘要:
In an insulated spherical tank for containing liquefied gas, said tank comprising a support in the form of a vertical, partially thermally-insulated skirt which forms a unified structure with the tank wall, wherein the insulation in the wedge-shaped region between the skirt and the spherical tank is sealingly joined, the sealed joint is secured with a mechanical connection.
摘要:
The disclosure is directed to a composite thermal insulator including a Freon gas expanded plastic, and an evacuated powder insulation. The present invention provides a composite thermal insulator light in weight and having a superior heat insulating performance over a long period through replacement of a thick metallic container conventionally used for the evacuated powder insulation and considered indispensable for withstanding a load at one atmospheric pressure and for preventing vacuum leakage, by a film-like plastic container, with activated carbon disposed in it.More specifically, the composite thermal insulator of the present invention includes a Freon gas expanded plastic, a film-like plastic container evacuated to form a vacuum in its interior, and directly contacting and/or covered by the expanded plastic, and activated carbon or inorganic powder containing activated carbon tightly enclosed in the plastic container, light in weight, having a heat conductivity lower than 0.01 kcal/mh.degree.C. and a mechanical strength sufficient for actual use, with almost no variations with time in the heat insulating property.
摘要:
This invention relates to a method for applying preformed cellular glass insulation blocks to the exterior surface of a spherical metallic storage vessel by the steps of:(a) cleaning the exterior surface of the vessel;(b) maintaining the vessel at a temperature of 80.degree.-100.degree. F.;(c)(1) beveling the side walls of a preformed cellular glass insulation block,(2) dishing the inner surface of the preformed block to correspond to the contour of the spherical vessel to which the block is to be adhered,(3) applying uncatalyzed urethane-modified asphalt adhesive stored at 35.degree.-50.degree. F. just prior to use to the thus dished inner surface and beveled edges of the cellular glass block to completely fill the dished surface,(4) spraying the thus-applied urethane-modified asphalt adhesive with a curing agent, and(5) pressing the block against the surface of the vessel whereby adhesive oozes from between the block and the surface of the vessel; and(d) repeating steps of (c) with successive blocks, each of which is butted firmly against adjacent previously-applied blocks, until the entire surface of the vessel is covered.
摘要:
A secondary insulating barrier for protecting the hold of a ship below a spherical low temperature liquified gas storage tank installed therein comprises at least two layers of rigid foam synthetic resin sprayed on the hold plates and covered by a layer of glass mesh and adhesive. Alternatively, the layers of synthetic resin, glass mesh and adhesive are applied to plywood attached to the hold plates by joists, thus forming an air space between the secondary barrier and the hold plates. Where the hold plates have a multi-surface construction, laminated rigid urethane foam blocks are butted end-to-end and are bonded to each other and to the plywood sheets at the corners between adjacent hold plates, the spray-formed layers are applied between the blocks, and the whole is covered by a protective layer of glass mesh and adhesive.