Bottom Patents (Class 122/382)
  • Patent number: 11060718
    Abstract: The invention relates to a flexible lance for machining or inspecting a tubesheet of a boiler, having a first strip made of a flexible, metallic material and a second strip made of a flexible, metallic material, wherein the second strip is arranged on the first strip in the longitudinal direction, and wherein at least the second strip has a shaped portion extending in the longitudinal direction for receiving a supply line for a machining or inspection head arranged at the free end of the flexible lance, and wherein the first strip is connected to the second strip such that an open side of the shaped portion is covered by the first strip so as to form a guide channel, and wherein at least one edge region of the flexible lance, extending in the longitudinal direction, is formed only by the first strip or the second strip.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: July 13, 2021
    Assignee: FRAMATOME GMBH
    Inventor: Zafer Alaz
  • Patent number: 10935644
    Abstract: An axis misalignment determining apparatus is configured to determine an axis misalignment in a sensor mounted on a vehicle by using a determining member mounted on the vehicle. The axis misalignment determining apparatus is provided with: a storage configured to store therein a result of detection of the determining member by the sensor in a condition in which there is no axis misalignment, as a detection result in a normal case; an acquirer configured to detect the determining member by using the sensor and configured to obtain it as a present detection result; and a determinator configured to determine whether or not there is an axis misalignment in the sensor by comparing the present detection result with the detection result in the normal case.
    Type: Grant
    Filed: October 5, 2018
    Date of Patent: March 2, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Hiromasa Hanai
  • Patent number: 10914466
    Abstract: A method for operating a heating boiler and variant embodiments thereof are proposed. A working fluid is heated in the heating boiler consisting of at least two chambers by the heat of at least one heat carrier, and, by means of at least one of the heat exchangers in the heating boiler, a change in the temperature of the heat carrier in relation to the working fluid in the chambers is realized by supplying a more greatly heated heat carrier to the chambers containing a more greatly heated working fluid and, correspondingly, supplying a less greatly heated heat carrier to the chambers containing a less greatly heated working fluid, and, after heating, the working fluid is conducted out of the chamber via at least one channel or valve for use. The technical result is an increase in the efficiency of the heat recovering.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: February 9, 2021
    Inventor: Eduard Petrovich Gayzer
  • Patent number: 10862018
    Abstract: A method for manufacturing a piezoelectric device that includes a substrate and a vibration portion that can include a membrane or a beam that is directly or indirectly supported by the substrate and arranged above the substrate. Moreover, the vibration portion includes a piezoelectric layer and the method includes forming the vibration portion and adjusting a resonance frequency of the vibration portion by locally subjecting a region including the vibration portion to heat treatment.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: December 8, 2020
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Takuo Hada, Kansho Yamamoto
  • Patent number: 10488076
    Abstract: A fluid circulation type heating apparatus includes: a circulation line; a heat radiation member installed on the circulation line; a boiler configured to heat and expand a fluid; a storage tank configured to store the fluid and to supply the fluid to the boiler; a controller configured to control the boiler; and a housing configured to accommodate the boiler and the controller. The apparatus further includes: a backflow prevention means removably installed in the housing and configured to, when mounted to the housing, communicate with the circulation line disposed between the boiler and the storage tank, the backflow prevention means configured to allow the fluid to flow in one direction through the circulation line.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: November 26, 2019
    Inventor: Young Jung Kim
  • Patent number: 10443948
    Abstract: A heat exchanger for a vehicle includes: a housing having an interior space; a header installed at one end of the housing and having a first fluid inlet manifold; a second fluid inlet manifold; and a second fluid outlet manifold; and a heat exchange core installed in the interior of the housing and having a plurality of core elements spaced apart from each other. The plurality of core elements are coupled to the header, and a plurality of first fluid passage, through which the first fluid passes, is respectively formed between the adjacent core elements. Each of the core elements has a second fluid passage, through which the second fluid flows, an inlet of the second fluid passage communicates with the second fluid inlet manifold, and an outlet of the second fluid passage communicates with the second fluid outlet manifold.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: October 15, 2019
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventor: Jung Min Seo
  • Patent number: 10393367
    Abstract: A sludge lancing system for use in a steam generator including a no tube lane disposed between a first bank of tubes and a second bank of tubes that are transverse to a horizontal reference plane, having a rail that extends through the no tube lane and includes a longitudinal center axis that lies in a first plane that is parallel to the reference plane, and a first lancing head, having a body portion a conduit, a nozzle assembly that is mounted to the body portion and is pivotable with respect to the body portion about an axis of rotation, the nozzle assembly including a manifold defining a conduit that is in fluid communication with the conduit of the body portion, at least a first nozzle that is mounted to the manifold and defines a conduit that generates a lancing fluid jet, wherein the conduit of the first nozzle lies in a first plane that is transverse to the longitudinal center axis of the rail so that the lancing fluid jet of the first nozzle is disposed in the first plane when the manifold is pivoted
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: August 27, 2019
    Assignee: BWXT Nuclear Energy, Inc.
    Inventor: Benjamin D. Fisher
  • Patent number: 10323860
    Abstract: An automatically flushing water heater maintenance system may be provided, the system including a water heater and a water heater controller. The water heater may include an inlet, an outlet, and a flush outlet having a first control valve in flow communication therewith. The first control valve may be configured to control a flow of water and sediment through the flush outlet out of the water heater. The water heater controller may be configured to communicate with the first control valve by transmitting a first control signal to the first control valve, the first control signal configured to cause the first control valve to open or close as part of an automatic flushing process. As a result of the flushing, the useful life of the water heater may be extended, and/or water heater leakage alleviated. Insurance discounts may be provided based upon using the automatic water heater flushing functionality.
    Type: Grant
    Filed: February 29, 2016
    Date of Patent: June 18, 2019
    Assignee: STATE FARM MUTUAL AUTOMOBILE INSURANCE COMPANY
    Inventors: Jeffrey A. Riblet, Melinda T. Magerkurth
  • Patent number: 10012381
    Abstract: A moveable sludge lance (76) said moveable sludge lance having duel lance heads (77, 79) passed through handholes (62) in the side of a nuclear steam generator and into a central tube lane (60) having a central stay rod (61) which cleans with high pressure fluid through the row 1 tubes (85) in the tube lane, where the distance (200) between the dual lance heads (77, 79) is wide enough to allow the dual lance heads to extend beyond the central stay rod (61).
    Type: Grant
    Filed: October 22, 2013
    Date of Patent: July 3, 2018
    Assignee: Westinghouse Electric Company LLC
    Inventor: Eric R. Haberman
  • Patent number: 8752511
    Abstract: A miniature sludge lance for a steam generator in a pressurized water nuclear reactor is provided. The sludge lance is structured to enter the steam generator via an inspection opening and has a body sufficiently thin to fit between adjacent tubes. The sludge lance rail has at least two types of nozzle assemblies that may be attached thereto. One nozzle assembly rotates and another nozzle assembly translates in a vertical direction. A drive assembly, a mounting assembly, an oscillation assembly, and flow straighteners are also provided.
    Type: Grant
    Filed: April 1, 2011
    Date of Patent: June 17, 2014
    Assignee: Westinghouse Electric Company LLC
    Inventors: Phillip J. Hawkins, Eric R. Haberman, Jerod J. Rudish, David W. Selfridge
  • Publication number: 20140102382
    Abstract: Blowdown of a pressurised steam boiler heated by a burner 1 and including a blowdown flow control valve 17 is controlled by opening the control valve in response to receiving a control signal from a control unit 20 to allow water to leave the boiler. The control unit receives one or more signals indicative of the steam production rate of the boiler and adjusts the amount of blowdown in dependence upon the aggregate steam production.
    Type: Application
    Filed: October 12, 2012
    Publication date: April 17, 2014
    Inventor: Brendan KEMP
  • Patent number: 8381770
    Abstract: A blowoff tank (B) for receiving blowdown, blowoff, and drain water from an HRSG (C) or other type of boiler, so as to lower the temperature of that water enough to enable it to be discharged into a sewer system, includes a generally cylindrical vessel (50) and inlet pipes (60) through which the blowdown, blowoff, and drain water is introduced into the vessel. Each pipe has a radial segment (62) that passes through the sidewall (52) of the vessel, a generally vertical segment (64) that extends upwardly within the vessel, and a tangential segment (68) that opens into the vessel. The radial segment contains a small drain aperture (74). The tank also has a cooling line (90) through which cooling water is introduced into the vessel to lower the temperature of the blowdown, blowoff, and drain water in the vessel and a drain line (86) that drains the mixture of cooling water and blowdown, blowoff, and drain water from the vessel, but never exceeds the elevation of the apertures in the inlet pipes.
    Type: Grant
    Filed: May 13, 2008
    Date of Patent: February 26, 2013
    Assignee: Nooter/Eriksen, Inc.
    Inventor: Joseph E. Schroeder
  • Patent number: 8238510
    Abstract: A method of cleaning sludge from the tube sheet (34) of a nuclear steam generator (10) includes introducing a moveable sludge lance (76) said moveable sludge lance having duel lance heads (77) through handholes (62) in the side of the generator and into a central tube lane (60) having a central stay rod (61) and sludge lancing with high pressure fluid through the row 1 tubes (85) in the tube lane, where the distance (200) between the dual lance heads (77) is wide enough to allow the dual lance heads to extend beyond the central stay rod (61).
    Type: Grant
    Filed: June 25, 2008
    Date of Patent: August 7, 2012
    Assignee: Westinghouse Electric Company LLC
    Inventor: Eric R. Haberman
  • Publication number: 20120118246
    Abstract: A sealed and self-contained tankless water heater flushing system including a holding basin, a cover lid for the holding basin firmly securable and sealed liquid tight to the holding basin, a submersible pump contained within the holding basin, a submersible pump hose, securable from the submersible pump within the holding basin to a discharge opening in the cover of the holding basin, a filter system, securable within the holding basin to a filter opening contained in the cover lid, wherein the filter system includes a filter for filtering solid substances from the tankless water heater during a flushing process, a discharge hose for connecting the discharge opening to the water heater, and a filter hose for connecting the filter opening to the water heater.
    Type: Application
    Filed: November 16, 2010
    Publication date: May 17, 2012
    Applicant: ZOELLER COMPANY
    Inventors: Deron B. Oberkorn, Gary L. Nichols, William L. Schmidt
  • Publication number: 20090092216
    Abstract: A U-tube steam generator having a dual system for collecting loose parts and sludge. A loose parts collector having a water overflow edge is disposed between a feedwater inlet and a tube bundle of the steam generator. A sludge collector having a water outlet is disposed downstream of the overflow edge of the loose parts collector and maintains a pressure differential between a water inlet of the sludge collector and the water outlet.
    Type: Application
    Filed: February 22, 2008
    Publication date: April 9, 2009
    Inventor: Min-Hsiung HU
  • Publication number: 20090000573
    Abstract: A sediment drain system used in a hot water heater having a tank with a top and a bottom, includes a hot water outlet in vicinity of the top of the tank, and a sediment removal tube having a tube inlet opening in vicinity of the bottom of the tank and a tube outlet opening in vicinity of the top of the tank. A combined hot water and sediment outlet connected to the hot water outlet and to the tube outlet opening mixes and draws off sediment and hot water together for a predetermined period of time from the vicinity of the top of the tank. A method for draining sediment from a water heater includes mixing and drawing off sediment and hot water together for a predetermined period of time from the vicinity of the top of the tank through the combined hot water and sediment outlet.
    Type: Application
    Filed: June 26, 2007
    Publication date: January 1, 2009
    Inventor: W. Thomas Mc Clellan
  • Patent number: 7367288
    Abstract: An upper bundle cleaning system of steam generator is disclosed which can clean heat transfer tubes and a plurality of tube support plates that support the heat transfer tubes and have slots, using a cleaning device transferred along a guide rail installed to an upper hand hole of the steam generator. The cleaning device is installed to an ascending/descending mechanism which is vertically transferable. The cleaning device includes a frame, at least one or more guide component, a spray component, and a hinge unit, such that the cleaning device is ascended and descended by the ascending/descending mechanism to clean the heat transfer tubes and the tube support plates.
    Type: Grant
    Filed: November 1, 2006
    Date of Patent: May 6, 2008
    Inventor: Kyung-sub Kim
  • Patent number: 7000571
    Abstract: The steam generator (1) comprises an outer casing (2) with an axis (8) that is in a vertical disposition when the heat exchanger is in service, a bundle of tubes having straight portions that are parallel to one another and to the axis (8) of the heat exchanger (1) inside the outer casing (2), at least one tube plate (4) having through holes, each receiving the end of a tube of the bundle, and at least one water chamber having a wall (6) that is circularly symmetrical about the axis (8) of the heat exchanger (1), the water chamber being fixed to the tube plate (4) at the bottom of the heat exchanger. The surface (14a) of the solid bottom (14) of the heat exchanger includes at least one central point disposed substantially on the axis of the heat exchanger (1) at a highest level relative to the set of points constituting the inside surface (14a) of the bottom (14) of the heat exchanger.
    Type: Grant
    Filed: August 5, 2004
    Date of Patent: February 21, 2006
    Assignee: Framatome ANP
    Inventors: Alain Doule, GĂ©rard Morin
  • Patent number: 6655322
    Abstract: The present invention relates to a method for automatically maintaining the concentration of scale forming minerals in boiler water for boiler systems utilizing bimodal feedwater pumps that deliver a substantially constant feedwater flow to the boiler drum when activated. According to the present invention, the feedwater supply pump and blowdown rate control valve are synchronized to remove boiler water at a predetermined rate when the feedwater pump is activated. The present invention thereby provides a simplified and less expensive method for controlling the concentration of dissolved solids in boiler water despite variations in the steam loads and/or other boiler operation parameters.
    Type: Grant
    Filed: August 16, 2002
    Date of Patent: December 2, 2003
    Assignee: ChemTreat, Inc.
    Inventors: Douglas A. Godwin, David A. Johnson
  • Publication number: 20030047196
    Abstract: A water lance blower for cleaning heat installations includes a water lance moveably mounted with a mouth thereof at or in a hatch. The water lance can blow a jet of water through the heating installation, through which flames and/or flue gases are guided, to wall regions accessible from the hatch, during operation. The water lance is provided with at least one sensor for detecting at least one predeterminable measurement value for monitoring the quality of the water jet. A method for operating the water lance blower includes detecting and evaluating at least one parameter characteristic of the quality of the water jet as a measurement value during operation of the water lance blower. The method permits an evaluation of the cleaning effect of the water lance blower during operation and, if required, influencing of the same.
    Type: Application
    Filed: September 3, 2002
    Publication date: March 13, 2003
    Inventors: Franz Bartels, Manfred Frach, Klaus Eimer
  • Patent number: 6513462
    Abstract: A scale removing device for removes scale adhering to the interior of a shell-and-tube-heat-exchanger-type steam generator. The scale removing device is provided with a flexible lance (58) holding a high-pressure water hose (91) movable with respect to a tube plate, tube support plates, and heat-transfer tubes. A cleaning head (60) is mounted to the forward end of the flexible lance. Formed inside the cleaning head is a cavitation generating nozzle hole (99a, 99b) communicating with the high-pressure water hose. Bubbles are generated at the time of cleaning, and the impact pressure generated when the bubbles collapse is propagated to remove scale over a wide range.
    Type: Grant
    Filed: September 28, 2001
    Date of Patent: February 4, 2003
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Tadashi Shiraishi, Takehiko Ichioka, Hideya Okada, Fumitoshi Nakao, Toshiyuki Kinugasa
  • Publication number: 20020160332
    Abstract: The present invention provides improved methods of reducing NOx emissions in the flue gases produced by a steam boiler fired by a fluid fuel and combustion air burner and including a steam drum provided with make-up water from which produced steam and blowdown steam are withdrawn. In accordance with the invention at least a portion of the blowdown steam is combined with the fluid fuel or combustion air or both.
    Type: Application
    Filed: April 26, 2001
    Publication date: October 31, 2002
    Inventors: John P. Guarco, Andrew S. Barrieau, Lev M. Tsirulnikov
  • Patent number: 6105539
    Abstract: A deposit removal high pressure spray apparatus for removing heat conduction inhibiting deposits on U-tubes at the top of a shell and tube type of nuclear steam generator (10) tube bundle (16) by crawling along flanged outboard support beams (18) above the U-tubes bundle. The apparatus includes: a crawler (66) with motive means 68 for "inch worm" movement; a rotationally driven base 62 provides movement of the sprayhead to either side of the outboard support beam; a rotationally driven extension arm 60 on rotating base 62 has an elongated reciprocally driven elevator 58 thereon; and, a wrist 52 reversibly and rotatably driven by motor 54a sweeps sprayhead 52 with nozzles 56 to clean the top of the bundle 16 tube lanes of 90.degree., 45.degree. and 135.degree. efficiently.
    Type: Grant
    Filed: May 23, 1995
    Date of Patent: August 22, 2000
    Assignee: ABB Combustion Engineering Nuclear Power, Inc.
    Inventors: William G. Ware, John F. Wallin
  • Patent number: 6073641
    Abstract: A water lance blower for cleaning heating installations, wherein a water lance (6) is movably (5) arranged with its mouth on or in a hatch (2) and can blow a water jet through the heating installation, which is in operation and is flowed through with flames and/or smoke, onto wall areas which can be reached from the hatch (2), wherein the water lance (6) is movable by at least one movement element, wherein path sensors are provided for precise determination of the position of the water lance (6), and wherein at least the area of the hatch (2) is sealed by a housing (31) to which blocking and flushing medium can be admitted. The water lance blower (6) can be guided along certain pre-calculated or previously memorised lines of movement at pre-calculated or previously memorised speeds, in particular dependent upon the position, by means of the measured values. The supply of blocking and flushing fluid can be controlled by pressure and/or temperature.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: June 13, 2000
    Inventors: Friedrich Bude, Karl Albers, Richard Zachay
  • Patent number: 5988117
    Abstract: An inlet is provided for delivering water into a water heater through a port in its top. The inlet includes a conduit having a distal portion that extends downwardly toward a bottom of the water heater. The inlet includes means for deflecting the water flow through openings in the inlet's wall in order to reduce the generation of temperature gradients that otherwise tend to develop within water heater tanks. A water heater assembly including such an inlet is also described.
    Type: Grant
    Filed: May 29, 1997
    Date of Patent: November 23, 1999
    Inventor: Eric M. Lannes
  • Patent number: 5847266
    Abstract: An improvement is disclosed for a boiler leak system that (a) measures fluid input into the recovery boiler system, (b) measures fluid output from the recovery boiler system, and (c) calculates fluid leakage loss based on an average difference between the measured fluid input and output values. The improvement increases the accuracy and responsiveness of calculating and interpreting the difference between the input and output fluid flow of the boiler. One aspect of the invention is an improved method which includes (1) compensating for the effects of boiler drum swelling and shrinking; (2) using multiple time frames to calculate the average differences between input and output such that a balance is struck between a highly responsive leak indication (short time frame) and a highly accurate leak indication (longer time frame); and/or (3) indicating a leak only after a predetermined certain sequence of significant differences between input and output is reached.
    Type: Grant
    Filed: September 13, 1996
    Date of Patent: December 8, 1998
    Assignee: Union Camp Patent Holding, Inc.
    Inventor: Albert A. Nevruz
  • Patent number: 5841826
    Abstract: A method for dislodging and dislocating scale, sludge, corrosion and other deposits from heat transfer equipment surfaces, such as boiler and heat exchanger surfaces in steam generation systems, which are in contact with aqueous systems. This invention relates to the introduction of an aqueous chemical cleaning solution into the heat exchanger vessel. The aqueous chemical cleaning solution contains a non-corrosive carrier agent and/or a non-corrosive intercalation agent. The carrier agent has the ability to penetrate the matrix of the sludge, scale and other deposits, and the intercalation agent causes the sludge, scale and other deposits to fracture and break apart. This invention relates to generating a series of pressure pulses within the non-corrosive aqueous chemical cleaning solution to create shock waves for dislodging, dissolving and fluidizing sludge and corrosion products.
    Type: Grant
    Filed: February 25, 1997
    Date of Patent: November 24, 1998
    Assignee: Westinghouse Electric Corporation
    Inventors: Michael W. Rootham, Mark J. Parvin
  • Patent number: 5813370
    Abstract: A steam generator lancing system for cleaning tubes and tubesheets of a steam generator. The lancing system includes a nozzle block including at least one nozzle adapted for fluid communication with a high pressure hose. The lancing system also includes a support assembly including a carrier for transporting the nozzle block through the steam generator and a control system operative to selectively position the nozzle with respect to the tubes and tubesheets in the steam generator. Finally, in the preferred embodiment, the lancing system includes a rocker assembly operable to rotate the nozzle about a rocker axis to improve cleaning efficiency.
    Type: Grant
    Filed: September 28, 1995
    Date of Patent: September 29, 1998
    Assignee: Franatome Technologies Inc.
    Inventors: George V. Owen, Scott M. Theiss
  • Patent number: 5769035
    Abstract: A sootblower system for a furnace combustion zone has two types of blower pipes. A first type is made of a high temperature resistant material, and projects a short distance vertically through the floor of the furnace into the combustion zone and has blower orifices substantially parallel to the floor. The second type of blower pipe is made of conventional metallurgical materials and the blower outlet is positioned between and extends through adjacent tubes in a membrane wall at a location proximate the furnace floor. Both types of blowers are stationary and continuously remain in position, inserted in the combustion zone. Both types are small in size and large in number and only a small number of blowers are active at any time. In operation, discrete puffs of blowing medium are forced through the blower pipes and across the furnace floor, entraining ash and particulates into the combustion gas stream, preventing small amounts of ash buildup within the furnace.
    Type: Grant
    Filed: October 24, 1996
    Date of Patent: June 23, 1998
    Assignee: McDermott Technology, Inc.
    Inventor: Ronald G. Fiedler
  • Patent number: 5609124
    Abstract: A cleaning device is proposed for hot water tanks which each include near a bottom end thereof a drain pipe for allowing water contained in the tank to be flushed out therefrom. The present cleaning device comprises a first conduit adapted to be permanently secured to the drain pipe of the tank, a second conduit, such as a garden hose, connected to a sewer or a drain, and a valve mounted between the first and second conduits for controlling the flow therethrough and thus the flushing of the water and of the impurities and residues contained in the tank. The valve is preferably of the motorized type and is actuated by a programmable timer in order that the tank can be automatically and periodically flushed without intervention from the user.
    Type: Grant
    Filed: October 12, 1994
    Date of Patent: March 11, 1997
    Inventor: Jacques Leclerc
  • Patent number: 5579726
    Abstract: A device for cleaning a combustion device such as a boiler coincidentally with operation of the boiler. The apparatus comprises a means for rotation of a lance and rotatable cleaning head attached to the lance. The lance also moves in a linear direction and out of a combustion chamber. The invention requires the presence of the linear and rotational driving mechanism exterior to the boiler to allow operation of the device while the combustion chamber is at high temperature. During operation, a high pressure water jet is expelled from the nozzles of the rotatable cleaning apparatus at greater than 10,000 psi. A microprocessor controls the system to allow a repeatable, consistent, and tailored cleaning of the internal components of a combustion device.
    Type: Grant
    Filed: August 4, 1994
    Date of Patent: December 3, 1996
    Inventor: Louis Finucane
  • Patent number: 5572957
    Abstract: An automated sludge lance and method is described for cleaning sludge from tubes in a steam generator. The lance guide and waterlance are moved inside the steam generator to direct a fluid between the tubes to effectively clean sludge from the tubes. The remote control system is mounted outside the steam generator where it is readily serviceable. The automated sludge lance and method can be used in the no-tube-lane, in the annular chamber, or in combination.
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: November 12, 1996
    Assignee: The Babcock & Wilcox Company
    Inventor: James P. Vandenberg
  • Patent number: 5570660
    Abstract: An automated sludge lance and method is described for cleaning sludge from tubes in a steam generator. The lance guide and waterlance are moved inside the steam generator to direct a fluid between the tubes to effectively clean sludge from the tubes. The remote control system is mounted outside the steam generator where it is readily serviceable. The automated sludge lance and method can be used in the no-tube-lane, in the annular chamber, or in combination.
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: November 5, 1996
    Assignee: The Babcock & Wilcox Company
    Inventor: James P. Vandenberg
  • Patent number: 5549079
    Abstract: A retractable sootblower having an open frame. The frame includes an inboard end wall, an outboard end wall and a pair of opposingly positioned side panels. The side panels are seamless and mounted to interconnect the inboard and outboard end walls together. The side panels cooperating with the end walls to generally define a rectangularly shaped structure which encloses the carriage and lance tube of the sootblower. The generally open top and bottom of the frame allows for substantially unobstructed access from above and below to the carriage and lance tube. The sootblower also includes a dry lance hub which eliminates various problems associated with lubricant deterioration.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: August 27, 1996
    Assignee: The Babcock & Wilcox Company
    Inventors: Jesse C. Johnston, Jr., James S. Kulig, Steven F. Lewis, Eric C. Collet, Mark J. Sepela, Michael L. Meuller
  • Patent number: 5517950
    Abstract: A cleaning system comprises a compressor for delivering pressurized air to an accumulator via a valve controlled line. An outlet line extends from the accumulator and terminates adjacent a furnace floor drain. Upon command the entire volume of pressurized air is instantaneously released from the accumulator for discharge out the outlet line and through the furnace drain. The relatively cooler, high pressurized air blasts impacts, vibrates and chills any slag deposits accumulating about the drain so as to remove the same. An alternative nozzle is disclosed which disperses the high impact blast about the drain.
    Type: Grant
    Filed: March 30, 1994
    Date of Patent: May 21, 1996
    Inventor: William E. Kendrick
  • Patent number: 5365891
    Abstract: An inlet water turbulator body is coaxially secured within the lower end of an inlet water supply dip tube vertically disposed with the storage tank portion of a water heater. A spaced plurality of vertically spiraling passages extend through the turbulator body and are operative, in response to discharge of hot water from the storage tank through its outlet fitting, to receive pressurized inlet water within the dip tube and discharge the received water from a the lower end of the turbulator body in a water discharge pattern that impinges upon the lower tank end wall with substantial vertically directed and horizontally swirling force components to thereby facilitate the dislodgement of sediment from the lower tank end wall.
    Type: Grant
    Filed: December 16, 1993
    Date of Patent: November 22, 1994
    Assignee: Rheem Manufacturing Company
    Inventor: David M. Hanning
  • Patent number: 5355844
    Abstract: A cleaning system comprises a compressor for delivering pressurized air to an accumulator via a valve controlled line. An outlet line extends from the accumulator and terminates adjacent a furnace floor drain. Upon command the entire volume of pressurized air is instantaneously released from the accumulator for discharge out the outlet line and through the furnace drain. The relatively cooler, high pressurized air blasts impacts, vibrates and chills any slag deposits accumulating about the drain so as to remove the same. An alternative nozzle is disclosed which disperses the high impact blast about the drain.
    Type: Grant
    Filed: May 26, 1993
    Date of Patent: October 18, 1994
    Inventor: William E. Kendrick
  • Patent number: 5337441
    Abstract: The present invention relates to an extraction/insertion type soot blowing apparatus in which a lance tube is inserted into a combustion chamber, and a high-pressure gas is blown from a nozzle provided at the tip end of the lance tube against a deposit adhered onto the inner surface of the combustion chamber to remove the deposit. A rack adapted to be advanced and withdrawn along with the lance tube, and a long shaft for rotating the lance tube, are driven due to connection thereof with two output shafts of a differential gear device, and rotation and linear motion of the lance tube are respectively restrained within predetermined ranges. Thereby, at first the lance tube is inserted into the combustion chamber at a high speed without being rotated, and thereafter the advance is stopped and a gas is discharged while the lance tube is being rotated.
    Type: Grant
    Filed: February 10, 1993
    Date of Patent: August 16, 1994
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Masaaki Miyamoto, Yoshinori Yuzaki, Kunihisa Fujihara
  • Patent number: 5335631
    Abstract: In a steam generator equipping a nuclear power station and having inverted U-Lubes connected to a tube plate or sheet (12) and surrounded by an inner envelope (26) having a lower flow distribution plate (41) in its bottom part, the space (46) known as a waterway between the tube plate (12), the flow distribution plate (41) and the hot and cold branches of the tubes contains a deflection and purging box (44). The latter extends over the entire length of the waterway and in height up to the upper edge of the lower envelope (26). It is provided on its lower face with purging orifices (50) and fulfils both a deflection function and a secondary fluid drainage function in the vicinity of the tube plate (12).
    Type: Grant
    Filed: April 15, 1993
    Date of Patent: August 9, 1994
    Assignee: FRAMATOME
    Inventors: Thierry Daffos, Christian Valadon
  • Patent number: 5323736
    Abstract: In a steam generator or boiler used in a nuclear reactor, the secondary water is supplied via at least one pipe (48) issuing directly into the bottom of an annular recirculation space (32) formed between the outer envelope (10) and an inner envelope (26) surrounding inverted U-tubes (24), on the side of the cold branches of the tubes. A perforated collar or flange (56) placed in the annular space (32), above the pipe (48), produces a pressure drop or flow limitation preventing the rise of the feed water and controls the circumferential distribution of the recirculation water, which drops from the separators (28).
    Type: Grant
    Filed: April 28, 1993
    Date of Patent: June 28, 1994
    Assignee: Framatome
    Inventor: Yves Pascal
  • Patent number: 5320072
    Abstract: An apparatus for removing sludge from the tubes and tubesheet of a steam generator. A support structure is adapted to be mounted at an access port of a steam generator. A lance tube extends from the support structure into the steam generator. A spool attached to a high pressure hose is received in the lance tube. A pinch roller assembly mounted on the support structure is used to move the cylinder through the lance tube. High pressure water flows through slots drilled in the spool and out holes in the lance tube against the tubes and tubesheet. A rocker motor causes back and forth rotation or rocking of the lance tube to create a sweeping action. The lance tube may also be adjusted axially to insure that the water streams are directed to the tube lanes.
    Type: Grant
    Filed: June 7, 1993
    Date of Patent: June 14, 1994
    Assignee: B&W Nuclear Service Company
    Inventors: Scott M. Theiss, Harry W. Masterton
  • Patent number: 5201281
    Abstract: A track and carriage combination for supporting maintenance equipment in pressurized water reactor steam generators is disclosed. A pair of outwardly extending grooves are machined into the annulus portion of the generator tubesheet. Geared segments are provided for being inserted in the grooves for forming a geared track upon which the maintenance device may be firmly supported. Each geared segment includes gear teeth, a base shaped to mate with and engage the annulus grooves. A keyway is provided at the tubelane for allowing the segments to be slidably inserted into the grooves. Each segment is slightly curved so as to form a track corresponding with the annulus curvature. The segments are interlockable so that the segments may be removed from the annulus without any segments being left inside the steam generator. If desired, the track may be of one-piece construction and permanently mounted in the annulus.
    Type: Grant
    Filed: March 10, 1992
    Date of Patent: April 13, 1993
    Inventor: Alexander Cella
  • Patent number: 5194217
    Abstract: An improved articulated sludge lance with a retractable movable extension nozzle for cleaning a steam generator. The extension nozzle includes a flexible conduit adapted to be moved with a wire cable to place the nozzle in close proximity to a support plate for effectively cleaning the broached holes therein. A bumper member fastened to the flexible conduit provides a side-to-side motion from impact with the tubes when the lance is moved therethrough.
    Type: Grant
    Filed: January 10, 1992
    Date of Patent: March 16, 1993
    Assignee: The Babcock & Wilcox Company
    Inventors: Daniel M. St. Louis, William G. Schneider
  • Patent number: 5178822
    Abstract: In combination with a steam generator having a plurality of generator tube support plates, each generator tube support plate having a plurality of openings and a plurality of generator tubes, each tube passing through aligned openings in the support plates, a corrosion monitoring system is provided including a mockup probe, comprising a probe tube support plate having an upper side and a lower side and having substantially the same thickness and being constructed of substantially the same material as the generator tube support plates, having at least one opening of substantially the same size and shape as the openings of the generator tube support plates; at least one probe tube having an upper end and a lower end and having substantially the same diameter as the generator tubes and being constructed of substantially the same material as the generator tubes, the probe tube passing through the opening of the probe tube support plate; and wherein the mockup probe is adapted such that it may be inserted and seal
    Type: Grant
    Filed: September 24, 1991
    Date of Patent: January 12, 1993
    Assignee: Arkansas Power and Light Company
    Inventors: Albert C. Buford, III, Donal W. Moore, James E. Nestell, Jr.
  • Patent number: 5152843
    Abstract: Sediment can be removed from hot water heaters via the method and apparatus of the invention. The tank is drained and the drain tube is used for access to the bottom of the tank. Water jet probes connected via a hose to a water supply are inserted through the drain valve opening, and are directed in such a way that the sediment is forced into suspension and runs out of the tank through the drain tube, around the probe. Preferably, the water and sediment drain into a pan, and preferably a pump is provided to pump water from the pan to a drain or other remote discharge location.
    Type: Grant
    Filed: July 16, 1991
    Date of Patent: October 6, 1992
    Inventors: George N. McDonald, Daniel G. McDonald
  • Patent number: 5092280
    Abstract: An apparatus for loosening and removing sludge and other impurities from the interior of a heat exchanger vessel which may be the secondary side of a nuclear steam generator is disclosed herein. The apparatus generally comprises a nozzle having a first end that is detachably mountable into an access opening such as a sludge lance port in the secondary side of the generator, and a second end that extends into the interior of the secondary side at a 30 degree downward angle relative to the tubesheet in the vessel for minimizing the stresses applied to the heat exchanger tubes, and for uniformly reflecting the pulse back up toward the upper portions of the secondary side. A pulse generator is operably connected to the nozzle which has a controller for controlling the power level of the pulses generated. To further minimize such peak tube stresses, the pulse generator includes a pulse flattener, and the second end of the nozzle is aligned down the main tube lane.
    Type: Grant
    Filed: August 10, 1989
    Date of Patent: March 3, 1992
    Assignee: Westinghouse Electric Corp.
    Inventors: Richard D. Franklin, Gregg D. Auld, David E. Murray
  • Patent number: 5088451
    Abstract: A system for removing sludge from a sludge-bearing fluid flowing in a vertically oriented nuclear steam generator so that the sludge is not present therein in sufficient quantities to corrode components (e.g., heat transfer tubes) located in the steam generator. The system comprises a tube sheet having a plurality of apertures therethrough for receiving the ends of the heat transfer tubes so that the tubes are supported by the tube sheet. The tube sheet has a top surface thereon and also a recess formed in the top surface for separating and for collecting the sludge from the sludge-bearing fluid. The recess has a substantially frusto-conical wall generally converging at the bottom end of the recess for providing a settling basin for the sludge after the sludge is separated from the sludge-bearing fluid. A pipe extends from adjacent the bottom end of the recess to the exterior of the heat exchanger for transporting the sludge from the recess to the exterior of the heat exchanger.
    Type: Grant
    Filed: April 9, 1990
    Date of Patent: February 18, 1992
    Assignee: Westinghouse Electric Corp.
    Inventors: Min H. Hu, Allen C. Smith, Jr., Robert M. Wilson, Robert M. Wepfer, Howard E. Braun
  • Patent number: 5069172
    Abstract: A process and system for removing sludge deposits from a tube sheet of a steam generator having at least one handhole provided adjacent the tube sheet is disclosed.
    Type: Grant
    Filed: September 26, 1990
    Date of Patent: December 3, 1991
    Assignee: Westinghouse Electric Corp.
    Inventors: Ray A. Shirey, David E. Murray
  • Patent number: 5065703
    Abstract: A system (10) for lancing sludge deposits (12) from within a bundle (14) of vertically extending steam generator tubes (16) of a PWR steam generator secondary side assembly (18) has a flexible lance (28) mounted in a lance guide/housing transporter (30). The transporter (30) is movable along blowdown lane (20) to position end (32) of the flexible lance opposite one of the inter-tube lanes (26) so that the flexible lance (28) may be inserted along the selected inter-tube lane (26). A rigid lance guide (34) on the transporter (30) has a curved end (36) configured to turn the flexible lance (28) at a chosen angle, such as 90.degree., so that the flexible lance (28) will be fed into the selected inter-tube lane (26). The transporter has a drive (37) for advancing the flexible lance (28) through end (36) of the lance guide (34) and into the inter-tube lane (26).
    Type: Grant
    Filed: January 27, 1989
    Date of Patent: November 19, 1991
    Assignee: Electric Power Research Institute, Inc.
    Inventor: Robert A. S. Lee
  • Patent number: 5019329
    Abstract: Both a system and a method for removing sludge and debris from the interior of the secondary side of a nuclear steam generator is disclosed. The method comprises the steps of introducing a sufficient amount of water in the secondary side to submerge at least the tubesheet, generating a succession of shock waves in the water by means of pulses of pressurized gas to create shock waves that loosen the sludge and debris, and vertically flushing the interior of the secondary side by suctioning water off from the bottom portion of the steam generator while simultaneously forcefully spraying water from the top portion of the generator over the bundle of heat exchanger tubes in order to remove the sludge and debris loosened by the shock waves.
    Type: Grant
    Filed: December 26, 1989
    Date of Patent: May 28, 1991
    Assignee: Westinghouse Electric Corp.
    Inventors: Richard D. Franklin, Gregg D. Auld, David E. Murray