摘要:
A flexible vibration stabilizer and method for reducing vibration in a tube of a shell and tube type heat exchanger wherein the stabilizer is an elongated flexible cable or chain which may have a plurality of rigid members loosely or fixedly mounted thereon. A plug may be used for simultaneously fixedly mounting the stabilizer in the tube and for sealing same.
摘要:
An inspection hole (17) is formed on a side surface of a boiler water tube (10a) in a longitudinal direction, a base side of a guide pipe (16) is connected to the inspection hole (17), and usually, a closing member (24) is attached to the guide pipe (16). In a case where the thickness of the boiler water tube (10a) is measured, the closing member (24) is released from the guide pipe (16), an ultrasonic probe (18) is inserted into the boiler water tube (10a) from a tip side of the guide pipe (16), and the ultrasonic probe (18) is moved in the boiler water tube (10a).
摘要:
An apparatus for producing inserts for steam generator tubes is intended to allow a technically particularly simple production process, and consequently allow particularly high-speed production of inserts. For this purpose, the apparatus comprises a winding head (12) with a wire guiding pin (20), a guiding opening (16) for a former shaft (1), provided with a number of spiral slots (4), and a pressure roller (22), the wire guiding pin (20), the guiding opening (16) and the pressure roller (22) being arranged in such a way that a tangent of the pressure roller (22) and of a slot (4) of the former shaft (1) and the guiding axis of the wire guiding pin (20) substantially coincide.
摘要:
Ein Dampferzeugerrohr (10), in dessen Rohrinnenraum (22) zur Bildung eines drallerzeugenden Innenprofils mindestens ein Rohreinsatz (18, 18', 18") angeordnet ist, soll bei einfach und kostengünstig gehaltener Fertigung und bei einer großen Bandbreite unterschiedlicher Betriebsbedingungen ein besonders günstiges Wärmeübergangsverhalten aufweisen. Dazu ist erfindungsgemäß der Rohreinsatz (18, 18', 18") von einem in der Art einer Schraubenfeder gewundenen, an der Rohrinnenwand (24) geführten Profildraht (20) gebildet.
摘要:
A heat exchange assembly (5), in particular for removing heat from a primary cooling fluid of a nuclear reactor, includes a heat exchanger (10) immersed at least partially in a low-pressure primary fluid (F1) and having a plurality of pressurized tubes (12) in which a high-pressure secondary fluid (F2) circulates for removing heat from the primary fluid; and a passive safety device (20) for limiting the discharge of secondary fluid (F2) in case of breaking of a tube (12); the device (20) includes a plurality of pairs of Venturi nozzles (21, 22) connected to respective tubes (12), each tube (12) being connected to a pair of Venturi nozzles (21, 22) arranged upstream and downstream of the heat exchanger (10), respectively, outside the primary flow (F1).
摘要:
An inspection hole (17) is formed on a side surface of a boiler water tube (10a) in a longitudinal direction, a base side of a guide pipe (16) is connected to the inspection hole (17), and usually, a closing member (24) is attached to the guide pipe (16). In a case where the thickness of the boiler water tube (10a) is measured, the closing member (24) is released from the guide pipe (16), an ultrasonic probe (18) is inserted into the boiler water tube (10a) from a tip side of the guide pipe (16), and the ultrasonic probe (18) is moved in the boiler water tube (10a).
摘要:
A heat transfer system includes a plenum configured to provide a secondary side fluid such as feedwater to a plurality of heat transfer tubes from a primary side fluid, and a tube sheet coupled to the plurality of heat transfer tubes. An orifice plate is mounted within the plenum and located adjacent to the tube sheet, and one or more orifice devices are supported by the orifice plate and are configured for insertion into or sealing against the plurality of heat transfer tubes. The one or more orifice devices may include center flow orifices, and/or rectangular or helical shaped transition stepped annular flow orifices, and an insertion of a number of the transition steps into the plurality of heat transfer tubes may determine a corresponding pressure drop of the secondary side fluid in the heat transfer system.
摘要:
Ein Dampferzeugerrohr (10) soll bei einfach und kostengünstig gehaltener Fertigung und bei einer großen Bandbreite unterschiedlicher Betriebsbedingungen ein besonders günstiges Wärmeübergangsverhalten aufweisen. Dazu ist erfindungsgemäß mindestens ein Einsatz (22) im Rohrinnenraum (18) zur Bildung eines drallerzeugenden Innenprofils angeordnet, wobei der Einsatz (22) eine Mehrzahl von Drähten (24) umfasst, die sich in der Art eines mehrgängigen Gewindes schraubenförmig an der Rohrinnenwand (26) entlangwinden.