摘要:
Capillaire en verre (10) pourvu d'un revetement metallique indique pour l'utilisation dans des applications de chromatographie en phase gazeuse. Un revetement ou chemise (12) metallique est forme sur le capillaire en verre (11) en le recouvrant d'un metal ou d'un alliage au fur et a mesure qu'il sort du four. Le metal ou alliage utilise est du type virtuellement chimiquement inerte par rapport aux materiaux comprenant le capillaire en verre a la temperature de depot pendant le revetement du capillaire en verre au moyen du metal ou de l'alliage et forme un joint hermetique autour de la surface exterieure du revetement en verre. Le revetement metallique empeche tout endommagement de nature chimique ou mecanique a la surface du verre, permettant ainsi de maintenir ou proteger la resistance initiale du capillaire en verre. Un revetement plastique (13) est prevu de maniere facultative pour assurer une protection supplementaire de la surface metallique.
摘要:
Metallic clad glass capillary (10) suitable for use in gas chromatography applications. A metallic coating or jacket (12) is formed on the glass capillary (11) by coating the glass capillary with a metal or alloy as the capillary is drawn from the furnace. The metal or alloy employed is one that is substantially chemically inert with respect to the material comprising the glass capillary at the deposition temperature during coating of the metal or alloy onto the glass capillary and forms a hermetic seal around the outer surface of the glass cladding. The metallic coating prevents chemical or mechanical damage to the glass surface to thereby maintain or preserve the nascent strength of the glass capillary. A plastic coating (13) is optionally provided for additional protection of the metal surface.
摘要:
This disclosure relates generally to corrugated pipe, and more particularly to corrugated pipe with an outer wrap. In one embodiment, a pipe includes an axially extended bore defined by a corrugated outer wall having axially adjacent, outwardly-extending corrugation crests, separated by corrugation valleys. The pipe also includes an outer wrap applied to the outer wall. The outer wrap may include fibers and plastic. The outer wrap may span the corrugation crests producing a smooth outer surface.
摘要:
A glass tube production method includes (1) preparing a tubular glass material, (2) irradiating an outer main surface of the tubular glass material with a laser to form an in-plane void region having a plurality of voids arranged on the outer main surface, and forming a plurality of internal void rows each having one void or two or more voids arranged from the in-plane void region toward an inner main surface of the tubular glass material, and (3) chemically strengthening the tubular glass material having the internal void rows formed therein.
摘要:
The invention relates to glass elements for the construction of devices, installations and pipe conduits. The surfaces of the inventive glass elements are completely or partially coated with a conductive coating, especially a transparent conductive polymer to reduce surface resistance. The invention further relates to the use of said elements and to the devices, installations and pipe conduits assembled from said elements.
摘要:
Device for connection between adjacent solar receiver tubes of the type which are at the end of the solar receiver tube (1) to be joined with another adjacent solar collector tube, comprising: - An expansion compensating element with at least two concentric bellows (7, 8) that are connected to each other and to a rigid ring (9) by means of a welded joint, which keeps them concentric in the expansion and compression process and joined to the glass tube (4) by the cover (12) and glass- metal transition element (21), - A connection flange (5) to connect the solar receiver tube (1) to the one adjacent thereto, the flange (5) being a round metal plate with a hole that houses the absorber tube (3), - Some through bolts (20) passing through the connection flange (5) to attach it with flange of the adjacent receiving tube (1).
摘要:
Two conventional thick- walled, drawn, fused quartz tubes (1,2) are arranged the one within the other. At their forward end of them, each is gripped in a collet (3,4). These forward collets are supported for travel along a track (5) by a distance equivalent to the length of the tubes. A heating, and drawing, station (6) is arranged a short distance back in the length of the tubes from an initial position of the forward chucks. At its furthest end, the outer tube is gripped by a tensioning collet (8), itself supported on the track. The collets are arranged to be driven along the track by respective stepper motors (9, 10, 11). At the heating station, heaters in the form of burners (12) are provided for heating the outer tube. Heat is applied at a rate to soften the outer tube. The forwards stepper motors draw the forward collets (3,4) such that the outer tube stretches. The rear, tensioning collet (8) moves forwards more slowly, whereby the outer tube is stretched sufficiently to reduce it in diameter into contact with the inner tube.
摘要:
The invention relates to glass elements for the construction of devices, installations and pipe conduits. The surfaces of the inventive glass elements are completely or partially coated with a conductive coating, especially a transparent conductive polymer to reduce surface resistance. The invention further relates to the use of said elements and to the devices, installations and pipe conduits assembled from said elements.
摘要:
Metallic clad glass capillary (10) suitable for use in gas chromatography applications. A metallic coating or jacket (12) is formed on the glass capillary (11) by coating the glass capillary with a metal or alloy as the capillary is drawn from the furnace. The metal or alloy employed is one that is substantially chemically inert with respect to the material comprising the glass capillary at the deposition temperature during coating of the metal or alloy onto the glass capillary and forms a hermetic seal around the outer surface of the glass cladding. The metallic coating prevents chemical or mechanical damage to the glass surface to thereby maintain or preserve the nascent strength of the glass capillary. A plastic coating (13) is optionally provided for additional protection of the metal surface.