摘要:
Method of filling a casing with heat insulating fibers in which a fibrous heat insulating mass of fixed size is inserted into a space to be filled by vacuum-packing the fibrous mass in a vacuum-resistant bag, which may then be wrapped about an inner cylinder, introducing the bag into an outer cylinder and, after breaking the vacuum seal, allowing the fibrous mass to swell and fill any space within the outer cylinder not occupied by said inner cylinder, if any.
摘要:
A panel of thermal insulation material has at least one main panel portion which comprises a dry particulate insulation material compressed within a porous envelope so that it is rigid or substantially rigid and at least one auxiliary panel portion which is secured to and extends along at least one of the edges of the or each of the main panel portions. The or each auxiliary panel portion comprises a substantially uncompressed dry particulate insulation material contained within an envelope. The insulation material of the auxiliary panel portion may be the same as or may be different from the insulation material of the main panel portion. The envelope of the auxiliary panel portion may be made of a porous or a non-porous material.
摘要:
A thermal insulating flexible ceramic based on a microporous oxide aerogel obtained from flame hydrolysis, especially a silica aerogel with elastically bending or limply bending inorganic fibers and possibly additional additive substances, such as opacifiers, has a portion by weight between about 10 and 30% of the flexible ceramic in the form of fibers with a length of more than 10 mm with a comparatively high bulk density of about 200 to 250 kg/m.sup.3, especially of about 350 kg/m.sup.3. Although no binder such as e.g. phenol resin is contained therein, said flexible ceramic in the case of a given high content of long fibers, has a high bending strength, but at the same time it is very resistant to breakage in the case even of multiple bendings around relatively small bending radii. For such a flexible ceramic, one may produce pliable thermal insulating foils (5) with low thicknesses (d) of, if necessary less than 1 mm, which still have considerable stability of shape, but which may be bent very well and may even be stamped. Furthermore, the flexible ceramic may be used for the formation of covered up insulating layers or of insulating layers laminated on both sides in thermal insulating elements possibly also of a more complicated molding. In order to be able to admix the high portion of long fibers without the formation of local fiber agglomerations, said fibers are admixed separated, e.g. by flakes, as a last component to the already finished premixture of the raw material.
摘要翻译:基于由火焰水解获得的微孔氧化物气凝胶的绝热柔性陶瓷,特别是具有弹性弯曲或弯曲无机纤维和可能的附加添加剂物质(例如遮光剂)的二氧化硅气凝胶具有约10至30%的重量份 长度大于10mm的纤维形式的柔性陶瓷,具有约200至250kg / m 3,特别是约350kg / m 3的较高堆积密度。 虽然没有粘合剂,例如 在其中含有酚醛树脂,在给定的高纤维含量的情况下,所述柔性陶瓷具有高弯曲强度,同时在相对小的弯曲半径周围的多个弯曲的情况下也非常耐破裂 。 对于这种柔性陶瓷,可以生产柔韧的热绝缘箔(5),其厚度低(d)如果需要小于1mm,其仍然具有相当大的形状稳定性,但是其可以弯曲得很好并且甚至可以是 盖章。 此外,柔性陶瓷可以用于形成覆盖绝缘层或层压在隔热元件两侧的绝缘层,也可能是更复杂的模制。 为了能够在不形成局部纤维聚集的情况下混合长纤维的高部分,所述纤维被混合分离。 通过薄片,作为已经完成的原料预混物的最后一个组成部分。
摘要:
An insulation arrangement in which a sheath (2) having at least one thin deformable wall (3), for example of foil, contains a powder insulating material (10), with a high vacuum within the sheath. The vacuum can be drawn through an opening (8) after a filter (9) is inserted to prevent removing the powder when the vacuum is drawn. The insulation arrangement can take the form of a panel or a pipe, and the thin wall (3) can be mechanically deformed after the vacuum is drawn.
摘要:
High temperature enclosures such as furnaces have a lining of refractory/insulating modules arranged in side to side relation after the manner of bricks and secured to metal supporting structure by means of fastening members which are disposed between adjoining modules, have laterally and oppositely directed projections which penetrate the facing sides of such modules, and a foot which is secured to the structure. A packing strip of a ceramic fibre material is arranged under compression between adjoining modules. Each module has the form of a hollow box and consists of a block moulded in one piece from ceramic fibre with a front wall, the front face of which constitutes the hot face of the module, and side walls. The module may include a block of insulating material which is secured on the back of the ceramic fibre block and the enclosed cavity may contain further insulating material.
摘要:
Technique for making exhaust muffler lining comprising mineral fibers with metal fibers distributed therein toward the inner surface of the lining, the metal fibers being bound by the fiber binder carried by the mineral fibers.
摘要:
Preformed foam insulation in longitudinal sections forming segments of an annulus are bonded to outer sheet metal covers. The segments are assembled about a pipeline which is to carry hot gas or oil in a cold climate such as the Arctic. To eliminate shear forces on the insulation because of differential thermal expansion and contraction of the pipe and the cover, the insulation has an inner diameter larger than the outer diameter of the pipe and friction reducing means is provided between the insulation and the pipe.
摘要:
A vacuum heat insulator is provided which includes a vacuum heat-insulated space defined between a pair of spaced outer skin members, a portion of the space closer to one of the outer skin members being set as high-temperature side, with a portion closer to the other outer skin member being set as low-temperature side. A laminate is disposed at the high-temperature side of the vacuum heat-insulated space, and a board having an inorganic material is disposed at the low temperature side. The laminate includes inorganic sheet members and metallic foils with low heat emissivity, the sheet members and metallic foils being alternately laid in plural layers.
摘要:
An insulating structure is provided for which comprises:(1) insulating material comprising one or more high-density, thermal/acoustical layers of highly bonded fibers; and(2) a chemically resistant, impermeable envelope enclosing said insulating material.Preferably, the insulating material also comprises one or more acoustical layers of loosely woven fiber cloth having openings correlated to the wavelength of the sound to be attenuated.Preferably the insulating structures of the subject invention comprise sealed mounting flanges extending from the edges of the envelope and means for removably attaching the insulation to the surface to be insulated.
摘要:
A molded thermal insulation body having a microporous thermal insulation material encased in a sheathing. The molded body is partially evacuated to a partial air pressure of 20 mbar or less. Following the evacuation of air, the molded body may be filled with krypton, xenon, sulfur hexafluoride, carbon dioxide or a combination thereof. A process for the manufacture of the molded thermal insulation body is also provided.