Abstract: A steam valve having a first inclined surface, which is formed at the distal end portion of a valve rod and in which the outer diameter of the valve rod increases from the distal end toward the base end of the valve rod, and a second inclined surface, which is formed on the inside of a portion of a main valve that is positioned on the base-end side of the valve rod and which inclines with the same inclination angle as the first inclined surface. In a state in which a slave valve and the main valve are closed the first inclined surface and the second inclined surface are separated from each other, and when the slave valve and the main valve are in a fully open state the first inclined surface and the second inclined surface abut each other.

Abstract: A supporting force inspection device for inspecting a supporting force of a vibration suppression member interposed between bend portions of a plurality of heat transfer tubes of a steam generator includes: an acceleration sensor for detecting a vibration state of the bend portion; a sensor holding part disposed inside the heat transfer tube and configured to hold the acceleration sensor; and a vibration force generation part configured to generate a vibration force for vibrating the heat transfer tube along a plane in which a curvature circle of the bend portion exists. The vibration force generation part is configured to cooperate with the sensor holding part and vibrate the heat transfer tube along the plane in which the curvature circle exists.

Abstract: In a seal structure for a heat exchanger, the seal structure being mounted on a baffle plate disposed in a shell included in the heat exchanger and being partially in contact with a wall surface on an inner surface side of the shell, the seal plate is composed of a plurality of thin plates which are laminated; the thin plates are in contact with the wall surface while being curved by an elastic deformation; a contact thin plate serving as one of the thin plates located on an outermost side of the curve is in contact with the wall surface; and an outer surface of the contact thin plate serving as a surface on an outside of the curve among surfaces arranged in a thickness direction of the contact thin plate is in contact with the wall surface so as to restrain seal performance from deteriorating.

Abstract: A steam valve having a first inclined surface, which is formed at the distal end portion of a valve rod and in which the outer diameter of the valve rod increases from the distal end toward the base end of the valve rod, and a second inclined surface, which is formed on the inside of a portion of a main valve that is positioned on the base-end side of the valve rod and which inclines with the same inclination angle as the first inclined surface. In a state in which a slave valve and the main valve are closed the first inclined surface and the second inclined surface are separated from each other, and when the slave valve and the main valve are in a fully open state the first inclined surface and the second inclined surface abut each other.

Abstract: A sealing device includes a movable part which is fixed to a shaft penetrating a wall of a vessel and is movable with the shaft, the vessel being configured to include an interior space, a first bellows part which has a first end fixed to the vessel and a second end fixed to the movable part, for sealing a penetrated portion of the vessel by the shaft, a second bellows part which is disposed opposite to the first bellows part across the movable part, and has a first end disposed on a side of the first bellows part and fixed to the movable part, and a second end fixed to a stationary member, and a communication path for causing an interior space of the first bellows part and an interior space of the second bellows part to communicate with each other.

Abstract: A supporting force inspection device for inspecting a supporting force of a vibration suppression member interposed between bend portions of a plurality of heat transfer tubes of a steam generator includes: an acceleration sensor for detecting a vibration state of the bend portion; a sensor holding part disposed inside the heat transfer tube and configured to hold the acceleration sensor; and a vibration force generation part configured to generate a vibration force for vibrating the heat transfer tube along a plane in which a curvature circle of the bend portion exists. The vibration force generation part is configured to cooperate with the sensor holding part and vibrate the heat transfer tube along the plane in which the curvature circle exists.

Abstract: There is provided a contact force evaluation method for evaluating a contact force against a supporting member of a tube bundle positioned in a fluid and supported by the supporting member, including a contact force setting step of setting a contact force of the tube bundle, a probability density function calculation step of calculating a probability density function of a reaction force received by the supporting member from the tube bundle in response to a predetermined input, using a vibration analysis model of the tube bundle and the supporting member, a probability calculation step of calculating a probability that a reaction force equal to or higher than the set contact force occurs, based on the calculated probability density function, and an evaluation step of evaluating the set contact force, based on the calculated probability.

Abstract: In a seal structure for a heat exchanger, the seal structure being mounted on a baffle plate disposed in a shell included in the heat exchanger and being partially in contact with a wall surface on an inner surface side of the shell, the seal plate is composed of a plurality of thin plates which are laminated; the thin plates are in contact with the wall surface while being curved by an elastic deformation; a contact thin plate serving as one of the thin plates located on an outermost side of the curve is in contact with the wall surface; and an outer surface of the contact thin plate serving as a surface on an outside of the curve among surfaces arranged in a thickness direction of the contact thin plate is in contact with the wall surface so as to restrain seal performance from deteriorating.

Abstract: A self-excited vibration evaluation method for evaluating self-excited vibration of a tube bundle arranged in a fluid so as to be supported by a support member includes: for each of at least one eigenmode of the tube bundle, a time history response analysis step of performing time history response analysis of simulating a change in vibration amplitude of the tube bundle, while changing a negative damping ratio corresponding to an excitation force of the fluid; calculating a critical flow velocity of the fluid on the basis of a minimum negative damping ratio at which the change of the vibration amplitude of the tube bundle diverges in the time history response analysis; inputting an expected flow velocity of the fluid; and evaluating the self-excited vibration of the tube bundle for each eigenmode by comparing the expected flow velocity of the fluid with the critical flow velocity.

Abstract: There is provided a contact force evaluation method for evaluating a contact force against a supporting member of a tube bundle positioned in a fluid and supported by the supporting member, including a contact force setting step of setting a contact force of the tube bundle, a probability density function calculation step of calculating a probability density function of a reaction force received by the supporting member from the tube bundle in response to a predetermined input, using a vibration analysis model of the tube bundle and the supporting member, a probability calculation step of calculating a probability that a reaction force equal to or higher than the set contact force occurs, based on the calculated probability density function, and an evaluation step of evaluating the set contact force, based on the calculated probability.

Abstract: A molded product made from a resin composition includes a polyamide resin and has a thickness of not less than 0.56 mm. A difference (Q?P) between Q and P is less than 0.06, where P (A1680/A1632) denotes an intensity ratio of a maximum value of absorbance A1680 at 1680 cm?1±8 cm?1 to a maximum value of absorbance A1632 at 1632 cm?1±8 cm?1 with an absorbance at 1800 cm?1 being set to 0 with regard to an infrared absorption spectrum of a cutting surface at a depth of 0.28 mm from a surface of the molded product, and Q (A?1680/A?1632) denotes an intensity ratio of a maximum value of absorbance A?1680 at 1680 cm?1±8 cm?1 to a maximum value of absorbance A?1632 at 1632 cm?1±8 cm?1 with an absorbance at 1800 cm?1 being set to 0.

Abstract: A guide vane has a devised guide configuration for changing a flow direction of molten solder. The guide vane comprises a half-cylindrical plate 11 having a prescribed inner surface shape and a prescribed height, being stood on a prescribed board and changing a flow direction of fluid; and a half-cylindrical plate 12 having a prescribed inner surface shape and a prescribed height, being stood on the board 13 on which the first member 11 is stood and changing the flow direction of the fluid as shown in FIG. 1. The half-cylindrical plate 11 and the half-cylindrical plate 12 are faced so that an inner surface of the half-cylindrical plate 11 is faced to an edge of the half-cylindrical plate 12 and an inner surface of the half-cylindrical plate 12 is faced to an edge of the half-cylindrical plate 11. This structure allows to jet the molten solder to a target place and uniformize a widthwise distribution of the jetting height of the molten solder.

Abstract: A thermoplastic resin composition includes 1 to 200 parts by weight of an inorganic filler (C) blended with 50 to 80 parts by weight of a thermoplastic resin (A) and 20 to 50 parts by weight of a rubbery polymer having a reactive functional group (B) which together account for 100 parts by weight; wherein the thermoplastic resin (A) and the rubbery polymer having a reactive functional group (B) form a continuous phase and a dispersed phase, respectively, while the inorganic filler (C) is dispersed in the continuous phase and/or the dispersed phase; and the dispersed phase of the rubbery polymer contains fine particles with a diameter of 1 to 100 nm of a compound resulting from a reaction between the thermoplastic resin (A) and the rubbery polymer; and an area occupied by the fine particles account for 10% or more of the dispersed phase.

Abstract: A guide vane has a devised guide configuration for changing a flow direction of molten solder. The guide vane comprises a half-cylindrical plate 11 having a prescribed inner surface shape and a prescribed height, being stood on a prescribed board and changing a flow direction of fluid; and a half-cylindrical plate 12 having a prescribed inner surface shape and a prescribed height, being stood on the board 13 on which the first member 11 is stood and changing the flow direction of the fluid as shown in FIG. 1. The half-cylindrical plate 11 and the half-cylindrical plate 12 are faced so that an inner surface of the half-cylindrical plate 11 is faced to an edge of the half-cylindrical plate 12 and an inner surface of the half-cylindrical plate 12 is faced to an edge of the half-cylindrical plate 11. This structure allows to jet the molten solder to a target place and uniformize a widthwise distribution of the jetting height of the molten solder.

Abstract: A thermoplastic resin composition includes 1 to 200 parts by weight of an inorganic filler (C) blended with 50 to 80 parts by weight of a thermoplastic resin (A) and 20 to 50 parts by weight of a rubbery polymer having a reactive functional group (B) which together account for 100 parts by weight; wherein the thermoplastic resin (A) and the rubbery polymer having a reactive functional group (B) form a continuous phase and a dispersed phase, respectively, while the inorganic filler (C) is dispersed in the continuous phase and/or the dispersed phase; and the dispersed phase of the rubbery polymer contains fine particles with a diameter of 1 to 100 nm of a compound resulting from a reaction between the thermoplastic resin (A) and the rubbery polymer; and an area occupied by the fine particles account for 10% or more of the dispersed phase.

Abstract: A heat transfer tube repairing apparatus including a wire that is flexible and is insertable into a heat transfer tube, a sleeve that is fixed to a predetermined position in the longitudinal direction of the wire, a pair of pressing members that is provided at the front and rear sides of the sleeve in the longitudinal direction of the wire and is able to press the inner surface of the heat transfer tube, and operation members that are able to move the pressing members between a pressing position where the pressing members press the inner surface of the heat transfer tube and a separating position where the pressing members are separated from the inner surface of the heat transfer tube.