A spacer for limiting the movement of a spigot in an insertion direction is mounted between a distal end portion of the spigot and a deep end face of a socket. The spacer has a cylindrical body sandwiched between the distal end portion of the spigot and the deep end face of the socket, a contact portion in contact with the deep end face of the socket on an end portion of the body, a centering contact face in contact with an inner surface of the socket, and an separating face that is separated from the deep end face of the socket in a removing direction of the spigot. A gap surrounded by the separating face of the spacer, the deep end face of the socket, and the inner surface of the socket is formed. The gap lies outside the contact portion of the spacer in a radial direction. The separating face is formed between the contact portion and the centering contact face in the radial direction.
F16L 21/04 - Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings in which sealing rings are compressed by axially-movable members
Provided is a melting furnace that enables efficient recovery of reusable useful metals from a treatment target containing metals. The melting furnace includes: a furnace chamber that performs melt treatment of a treatment target containing useful metals; a slag port that discharges molten slag generated by the melt treatment; and a furnace floor that guides the molten slag to the slag port, wherein an accumulation mechanism that accumulates molten metal contained in the molten slag is provided on the furnace floor, the accumulation mechanism being configured with a recess formed in front of the slag port on the flat furnace floor and configured to precipitate the molten metal in the recess.
A gland is provided in a pipe joint in which a sealing member is inserted between an outer circumference of a spigot and an inner circumference of a socket, the gland is arranged along an outer circumference of the spigot so as to face an opening end surface of the socket from the outer side, and the gland is connected to the socket by a plurality of fasteners to push the sealing member toward a deeper side of the socket. The gland has a pressing surface that presses the sealing member, a plurality of insertion holes through which the fasteners are inserted, a contact portion that is brought into contact with the opening end surface of the socket, and a tapered surface formed on an inner circumference. The tapered surface has the diameter expanded from a side closer to the pressing surface to the opposite side farther away therefrom.
F16L 21/04 - Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings in which sealing rings are compressed by axially-movable members
A gland is fit onto a spigot so as to face the opening end face of a socket from the outside and is coupled to the socket with a plurality of fasteners so as to press a seal member into the socket, wherein the gland has a pressing face for pressing the seal member, a plurality of fastener insertion holes where the fasteners are inserted, an equal interval region in which intervals between the fastener insertion holes in a circumferential direction A are kept at equal intervals, and an extended interval region in which an interval between any adjacent two of the fastener insertion holes is larger than the equal intervals, and the extended interval region includes a reinforcing member.
F16L 21/04 - Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings in which sealing rings are compressed by axially-movable members
5.
WORK MANAGEMENT DEVICE, WORK MANAGEMENT METHOD, AND WORK-IN-PROGRESS ESTIMATION MODEL
A task in operation is accurately inferred. A task management device (3) includes: a data generating section (336) that generates time series data of coordinates; a linear data extracting section (337) that extracts linear data from the time series data of the coordinates; and a task inferring section (339) that infers, on the basis of the linear data and a target object included in a captured image, a task being carried out at a time point at which the captured image is obtained.
The objective of the present invention is to achieve a determining method for determining a bending angle with a high degree of accuracy. This bending angle determining method includes: an input accepting step of accepting input of a parameter for each of a plurality of prescribed positions set in a circumferential direction of a first pipe, for a joint in which the first pipe and a second pipe are joined together; and a bending angle determining step of determining a suitability of the bending angle in the joint on the basis of the plurality of parameters input in the input accepting step.
It is possible to precisely manage a task in operation by precisely inferring the task with use of a trained model that is constructed by machine learning. A task management device (3) includes: a first outputting section (312) configured to output a detection class that is inferred to appear in a task at a time point at which a captured image is obtained, the detection class being inferred by inputting the captured image to an index inference model (321); and a task inferring section (314) configured to infer, on the basis of an output result from the first outputting section, the task being carried out at the time point at which the captured image is obtained.
An object of the present invention is to provide a torch nozzle having a cooling structure with an enhanced cooling effect. A torch nozzle 10 according to the invention has an attachment surface 11 to be attached to a tip of a torch head for plasma powder overlay welding, and a distal end surface f12 acing a workpiece, the torch nozzle comprising an arc passing hole 20 extending through the attachment surface to the distal end surface and configured to pass therethrough a plasma arc generated by an electrode rod inserted from the attachment surface, a plurality of powder gas channels 40 arranged at intervals in the circumferential direction outside the arc passing hole and each extending through the attachment surface to the distal end surface, and a cooling water passage 50 disposed between the attachment surface and the distal end surface to surround the powder gas channels and in communication with a cooling water inlet and a cooling water outlet formed in the attachment surface, wherein the cooling water passage 50 is formed in a meander shape, and includes a first section 55 extending along an outer periphery of each of the powder gas channels, and a second section 56 positioned between each pair of the adjacent powder gas channels and extending toward the arc passing hole.
A pipe joint is provided in which a seal member insertion space is formed between a first tapered surface of a socket and an outer circumference of a spigot, a seal member is inserted into the seal member insertion space, and a gland that presses the seal member into the seal member insertion space is externally fitted to the spigot. The seal member has a bulb part at one end part thereof. A guide part that guides the bulb part from an opening end face of the socket into the seal member insertion space is formed on the inner circumference of the socket. The guide part has a second tapered surface. An angle of inclination of the second tapered surface is greater than an angle of inclination of the first tapered surface.
F16L 21/04 - Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings in which sealing rings are compressed by axially-movable members
10.
BURIED PIPING REPLACEMENT PERIOD PREDICTION APPARATUS, BURIED PIPING REPLACEMENT PERIOD PREDICTION METHOD, COMPUTER PROGRAM PRODUCT, AND COMPUTER-READABLE MEMORY
A buried piping replacement period prediction apparatus includes a buried piping attribute data acquisition unit and an exceedance-probability-of-corrosion-depth prediction unit. The buried piping attribute data acquisition unit acquires attribute data of buried piping. The attribute data of the buried piping includes a first environmental factor of the buried piping, a first burial period of time of the buried piping, and a nominal pipe wall thickness or an allowable corrosion depth of the buried piping. The exceedance-probability-of-corrosion-depth prediction unit calculates an exceedance probability of corrosion depth of the buried piping in a certain period from an exceedance-probability-of-corrosion-depth prediction model for the first environmental factor, the first burial period of time, and the nominal pipe wall thickness or the allowable corrosion depth.
The present disclosure refers to a method for operating an agricultural machine (1), the machine having working tools (2) configured for mechanical weeding, the method comprising, while the agricultural machine (1) is travelling on a field, receiving first weed condition data indicative of a first weed condition of weed to be mechanically weeded by the working tools (2) in a control unit (3) of the agricultural machine (1); providing first control signals in the control unit (3) in response to receiving the first weed condition data, the first control signals assigned to the first weed condition according to operation control data stored in a memory device; operating the working tools (2) according to the first control signals for mechanical weeding; receiving second weed condition data indicative of a second weed condition of the weed to be mechanically weeded, wherein the second weed condition is different from the first weed condition; providing second control signals in the control unit (3) in response to receiving the second weed condition data, the second control signals assigned to the second weed condition according to the operation control data; and operating the working tools (2) according to the second control signals for mechanical weeding. Furthermore, an agricultural machine (1) is disclosed.
The present invention provides a thermal decomposition pipe which is equipped with a stirring element therein, has an excellent stirring effect, and is capable of improving heat transfer efficiency while preventing an increase in pressure loss of an intra-pipe fluid.?This thermal decomposition pipe 10 equipped with a stirring element has one or a plurality of stirring elements 20 for fluid on the inner surface of a pipe which has a fluid inlet on one end side of a pipe axis and a fluid outlet on the other end side, and is formed such that a top part 21 protrudes inward, wherein the stirring element is formed so that the longitudinal direction thereof is spirally inclined or perpendicular to the pipe axis, and the top part is eccentric toward the fluid inlet side 11 or the fluid outlet side 12 with respect to the center O in the width direction perpendicular to the longitudinal direction.
F28F 1/40 - Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
F28F 13/06 - Arrangements for modifying heat transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
13.
LEARNING MODEL GENERATING DEVICE, INFERRING DEVICE, AND AERATION AMOUNT CONTROL DEVICE
A future state of a separation membrane is inferred to perform a stable membrane filtration operation. A learning model generation device (1) includes: an input data acquisition section (21) configured to acquire input data derived from operation data that is measured during a membrane filtration operation, the operation data including a membrane filtration pressure and a diffused air volume; and a learning section (13) configured to generate a learning model (31) for inferring the state of the separation membrane, by means of machine learning using the acquired input data as an input.
G05B 11/36 - Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential
G05B 13/02 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
G05B 13/04 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
14.
PIPING DIAGRAM CREATION METHOD AND PIPING DIAGRAM CREATION DEVICE
A piping diagram creation device is provided configured to: generate virtual pipelines, the virtual pipelines being identified by characteristic evaluation data expressed as a sequence of numbers with an assembling angle ?i of assembling portions of the respective straight pipes and cut pipes allocated between respective intersections, and an adjustment margin Lj of the cut pipe length as variables; calculate an evaluation value of each virtual pipeline based on a difference value and so on between the total number of intersections and control points and the number of intersections and control points having an error between the virtual pipeline and each intersection and between the virtual pipeline and each control point at or below a predetermined threshold, the latter number being a continuous count from the start point; and generate a pipeline assembling diagram based on one virtual pipeline with an excellent evaluation value.
G06F 30/18 - Network design, e.g. design based on topological or interconnect aspects of utility systems, piping, heating ventilation air conditioning [HVAC] or cabling
G06F 30/27 - Design optimisation, verification or simulation using machine learning, e.g. artificial intelligence, neural networks, support vector machines [SVM] or training a model
15.
METHOD FOR PRODUCING TITANIUM-NIOBIUM COMPOSITE OXIDE
A method for producing a titanium-niobium composite oxide according to the present invention uses, as a starting material, niobium oxide having multiple crystal forms mixed therein and containing a first Nb2O5 structure, and a second Nb2O5 structure and/or a third Nb2O5 structure. The first Nb2O5 structure has a peak at which 2? is 23.6-23.8°, a peak at which 2? is 24.8-25.0° and a peak at which 2? is 25.4-25.6°. The second Nb2O5 structure has a peak at which 2? is 23.7-23.9°, a peak at which 2? is 24.3-24.5° and a peak at which 2? is 25.4-25.6°. The third Nb2O5 structure has a peak at which 2? is 22.5-22.7°, a peak at which 2? is 28.3-28.5° and a peak at which 2? is 28.8-29.0°. 2? is the angle of diffraction in an X-ray diffraction spectrum using a Cu-K? radiation source.
H01M 4/485 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
16.
WATERTIGHTNESS TESTING METHOD AND ASSEMBLING DEVICE
A watertightness testing method for testing watertightness of a joined section (4) where one end section of a second pipe (3) is joined to a first pipe (2), the watertightness testing method including: inserting a testing device body (21) into the first pipe (2); attaching an assembling device (80) to another end section of the second pipe (3); attaching a pulling device (82a) to the assembling device (80) and connecting the pulling device (82a) to a strap-shaped member(112a) having been wound in advance around an outer circumference of the first pipe (2); operating the pulling device (82a) and pulling the strap-shaped member(112a) in a separating direction of the second pipe (3) to have a reaction force generated in the second pipe (3) cause the second pipe (3) to be pulled in a joining direction (G), the one end section of the second pipe (3) to be inserted into the first pipe (2), and the second pipe (3) to be joined to the first pipe (2); and operating a moving operation rod (22) provided in the testing device body (21) from outside of the other end section of the second pipe (3) in a state where the second pipe (3) is being pulled in the joining direction (G) to move the testing device body (21) to the joined section (4).
G01M 3/04 - Investigating fluid tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
G01M 3/28 - Investigating fluid tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for valves
17.
WATERTIGHTNESS TESTING DEVICE AND WATERTIGHTNESS TESTING METHOD
A watertightness testing device for performing a watertightness test of a joined section between joined pipes, the watertightness testing device including a testing device body and a moving operation rod for moving the testing device body in the pipes in a pipe axial direction from outside an end section of the pipes, wherein the moving operation rod is provided in the testing device body and extends along the pipe axial direction, main supporting members for supporting the moving operation rod are provided on the moving operation rod outside the pipe, and the main supporting members have a rotatable main rolling member in a lower end section, the main supporting members are switchable between a supporting posture in which the main supporting members support the moving operation rod outside of the pipes and a folded posture in which the main supporting members are folded inside the pipes, and the main supporting members are urged from the folded posture toward the supporting posture.
G01M 3/04 - Investigating fluid tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
G01M 3/28 - Investigating fluid tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for valves
18.
TITANIUM-NIOBIUM OXIDES AND ELECTRODES AND LITHIUM-ION SECONDARY CELLS EMPLOYING TITANIUM-NIOBIUM OXIDES
The purpose of the present invention is to provide: a titanium-niobium compound oxide in which commingling of TiO2 or Ti2Nb10O29 and crystal grain growth are suppressed; and an electrode and a lithium ion secondary battery using the oxide. The titanium-niobium compound oxide according to the present invention contains less than 0.30 atom% of an alkali metal element, contains at least one element of Al, Y, La, Ce, Pr and Sm, and has a ratio of the total atomic weight of Al, Y, La, E, Pr and Sm to the total atomic weight of Ti and Nb of 0.001 or greater.
There is provided a ring body 31 to be provided in a pipe joint 1 which can prevent a spigot 5 from separating from a socket 3 by a spigot protrusion 15 engaging with a lock ring 8 from the back side of the socket 3 in the separation direction A of the spigot 5, the ring body 31 including a main body part 32 which is inserted into between the inner peripheral surface of the socket 3 and the outer peripheral surface of the spigot 5 to be provided in the pipe joint 1, and a deviation prevention member 33 that prevents the main body part 32 from deviating to the opening end side of the socket 3, wherein the main body part 32 moves the spigot 5 in the pipe radial direction with respect to the socket 3, thereby reducing deviation in the pipe radial direction between the pipe axis of a first pipe 4 and the pipe axis of a second pipe 2.
In a pipe joint 1, a spigot 5 is inserted into a socket 3; a lock ring 8 is accommodated in a lock ring-accommodating groove 7 formed in the inner circumference of the socket 3; and an engaging part 15 formed in the outer circumference of the spigot 5, wherein the engaging part 15 engages with the lock ring 8 from a back side of the socket in a separation direction A of the spigot 5, thereby preventing the spigot 5 from separating from the socket 3. The engaging part 15 is formed at a position receding from a distal end of the spigot 5 in the separation direction A of the spigot 5. A bending suppressing member 35 for restricting the socket 3 and the spigot 5 in a bending direction C is provided between the inner circumference of the socket 3 and the outer circumference of the spigot 5 in the range between the distal end of the spigot 5 and the engaging part 15.
F16L 21/04 - Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings in which sealing rings are compressed by axially-movable members
F16L 21/08 - Joints with sleeve or socket with additional locking means
21.
PIPE TRANSPORT DEVICE AND PIPE JOINING METHOD INSIDE PIPELINE CONSTRUCTION SHAFT
A first transport trolley 12 on which a first pipe 11 is loaded and a second transport trolley 15 on which a second pipe 14 is loaded are moved forward and one end 19 of the first pipe 11 is joined to the other end 20 of the rearmost pipe 4 in a pipeline 2; the other end 20 of the first pipe 11 is lifted; the first transport trolley 12 and the second transport trolley 15 are moved back and the first transport trolley 12 is removed to the front side from under the first pipe 11; a connection member 28 is removed and the first transport trolley 12 and the second transport trolley 15 are separated; the first transport trolley 12 is moved back and pulled in under the second pipe 14 that is loaded on the second transport trolley 15; the second transport trolley 15 is moved forward with the first transport trolley 12 and the one end 19 of the second pipe 14 on the second transport trolley 15 is joined to the other end 20 of the first pipe 11 that is joined to the rearmost pipe 4.
This watertight testing device 21 has: a cylindrical core 22 internally fitted to a pipe joint part 1; a first seal member 23 that seals the space between the outer circumference of the core 22 and the inner circumference of one pipe 2; a second seal member 24 that seals a space between the outer circumference of the core 22 and the inner circumference of the other pipe 4; a first pressing member 25 that presses and compresses the first seal member 23 into a first seal member insertion space 46; a second pressing member 26 that presses and compresses the second seal member 24 into a second seal member insertion space 47; a moving device 27 that moves the first and second pressing members 25, 26 in the pipe axial direction A; and a testing fluid supply device 28 that supplies a testing fluid into a testing space 71.
G01M 3/28 - Investigating fluid tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for valves
F16J 15/10 - Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
Provided is a dehydrogenation catalyst with which it is possible to suppress caulking and increase the yield of an olefin in a thermal decomposition reaction of a hydrocarbon raw material. This dehydrogenation catalyst (4A) used in the manufacture of an olefin contains at least one element of La and Ce as a catalyst component. The dehydrogenation catalyst (4A) contains at least one element selected from the group consisting of Ba, Fe, and Mn when the dehydrogenation catalyst (4A) does not contain Ce. The dehydrogenation catalyst (4A) contains at least one element of Fe and Mn when the dehydrogenation catalyst (4A) contains Ce.
B01J 23/83 - Catalysts comprising metals or metal oxides or hydroxides, not provided for in group of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups with rare earths or actinides
A prime mover includes an engine, a fan to generate a cooling airflow around the engine, an air-intake tube to supply outside air to the engine, a connection tube to supply, to the air-intake tube, a blow-by gas generated in the engine, and a wind shielding member to shield the connection tube from the cooling airflow, the wind shielding member being arranged around the connection tube.
Provided is a pipe joint 1 in which a seal body 26 and a spacer 30 are mounted from the insides of pipes 2, 4, wherein: an insertion port 5 of one pipe 4 is inserted into a socket 3 of the other pipe 2; and an annular accommodation space 25 is formed between the inner circumference of the socket 3 and the outer circumference of the insertion port 5. Inside the accommodation space 25 are accommodated: a seal body 26 for sealing the gap between the socket 3 and the insertion port 5; a push ring 29 which presses the seal body 26 to keep the seal body 26 in a compressed state; and a spacer 30 which maintains the gap between the push ring 29 and the deep end of the socket 3 in the pipe axial direction.
This composite titanium oxide compound is a composite titanium oxide compound wherein primary particles of an alkali metal titanate compound and primary particles of an alkaline earth metal titanate compound are joined to foigi secondary particles. The secondary particles have an average particle size of 1 to 80 gm. When the concentration of elements in the secondary particles is analyzed, a region where the alkaline earth metal is detected covers 50% or more of the surface area in 3% or less of the total number of secondary particles.
MANAGEMENT DEVICE FOR WATER TREATMENT FACILITY, CLEANING CHEMICAL SOLUTION ORDER PLACEMENT SYSTEM FOR WATER TREATMENT FACILITY, CHEMICAL SOLUTION ORDER PLACEMENT METHOD FOR WATER TREATMENT FACILITY, AND CHEMICAL SOLUTION CLEANING PLANNING METHOD FOR WATER TREATMENT FACILITY
A management device 20 for a water treatment facility using a membrane separation device is provided with: a water treatment facility information receiving unit 21 for receiving operating information and cleaning solution stock information transmitted via a communications medium from management terminals 11 1n for managing operating information for a water treatment system wherein the membrane separation device is installed; an inter-membrane pressure differential prediction unit 23 for predicting trends in inter-membrane pressure differential for the water treatment system on the basis of the operating information; a chemical cleaning planning unit 24 for creating a chemical cleaning plan such that chemical cleaning is performed before the value or rate of change of the inter-membrane pressure differential predicted by the inter-membrane pressure differential prediction unit reaches a set value; a solution order placement information generating unit 27 for generating solution order placement information on the basis of the chemical cleaning plan and cleaning solution stock information; and a solution order placement information transmission unit 28 for transmitting solution order placement information generated by the solution order placement generating unit to an external device including the management terminals.
The present invention provides a heat-resistant alloy and a reaction tube having exceptional oxidation resistance, mechanical properties such as tensile malleability, and welding properties. This heat-resistant alloy comprises, in mass%, 0.35-0.7% of C, more than 0% and no more than 1.5% of Si, more than 0% and no more than 2.0% of Mn, 22.0-40.0% of Cr, 25.0-48.3% of Ni, 1.5-4.5% of Al, and 0.01-0.6% of Ti, the balance being Fe and unavoidable impurities. In addition, Pa < Ya, where Pa = -11.1 + 28.1 × C + 29.2 × Si - 0.25 × Ni - 45.6 × Ti, and Ya = -13.75 × Al + 63.75.
The present invention provides a steel product that has excellent oxidation resistance on a surface thereof that is to come into contact with a steel material and that also has excellent weldability. The steel product for use in contact with a steel material according to the present invention is a steel product for use in contact with a steel material, the steel product inclucling a centrifugally-cast portion formed on a surface of the steel product that is to come into contact with the steel material, the centrifugally-cast portion being made through centrifugal casting, and a statically-cast portion to which the centrifugally-cast portion is welded, the statically-cast portion being formed through static casting, the centrifugally-cast portion containing, in terms of mass%, C: 0.2% to 0.7%; Si: more than 0% and 2.0% or less; Mn: more than 0% and 3.0% or less; Cr: 15.0% to 40.0%; Ni: 18.0% to 55.0%; Al: 1.0% to 5.5%; and at least one type selected from the group consisting of Ti: 0.01% to 0.6% and/or Nb: 0.1% to 1.8%, the balance being composed of Fe and inevitable impurities.
A substrate steel of the comprising from O. 01 to 0.60 wt. % of La, from 0.0 to 0.65 wt. % of Ce; from 0.06 to 1.8 wt. % of Nb up to 2.5 wt % of one or more trace elements and carbon and silicon may be treated in an oxidizing atmosphere to product a coke resistant surface coating of MnCr 2O4 having a thickness up to 5 microns.
The present invention provides: an alloy for overlay welding, the alloy being capable of forming an Al oxide-containing alumina barrier layer in a protrusion overlay-welded on the inner surface of a reaction tube; a welding powder; and a reaction tube having a protrusion overlay-welded as an agitating member on the inner surface. This alloy for overlay welding is composed of 0.2-0.6% of C, more than 0% and not more than 1.0% of Si, more than 0% and not more than 0.6% of Mn, 25-35% of Cr, 35-50% of Ni, 0.5-2.0% of Nb, 3.0-6.0% of Al, and 0.005-0.05% Y, with the remainder comprising Fe and inevitable impurities.
The present invention provides: a tubular body used in high temperature atmospheres; and a method for stably forming a metal oxide layer to have a high surface area on the inner surface of the tubular body. This tubular body used in high temperature atmospheres is made of a heat resistant alloy, which contains 15% or more of Cr and 18% or more of Ni in mass%, and has the inner surface of which the arithmetic average roughness (Sa) of the three-dimensional surface roughness satisfies 1.5=Sa=5.0, and the skewness (Ssk) of the surface height distribution satisfies |Ssk|=0.30. Said heat resistant alloy may contain 2.0% or more of Al in mass%. The kurtosis (Sku) of the surface height distribution of the three-dimensional surface roughness of the inner surface may satisfy Sku=2.5.
A reaction tube has a tube main body with an overlay-welded projection at its inner surface. The tube main body is made of a heat-resistant alloy containing Al (?2.0 mass%) and Nb (> 0 to <0.5 mass%). The projection contains C (0.2 to 0.6 mass%), Si (>0 to 1.0 mass%), Mn (> 0 to <0.6 mass%), Cr (25 to 35 mass%), Ni (35 to 50 mass%), Nb (0.5 to 2.0 mass%), Al (3.0 to 4.0 mass%), Y (0.005 to 0.05 mass%), with Fe and inevitable impurities as a remaining portion. The projection contains at least two times the amount of Nb in the tube main body. The projection may optionally include a rare earth element (0.01 to 0.20 mass%); or one or more of W (>0 to <2.0 mass%), Mo (>0 mass% to <1.0 mass%), Ti and/or Zr (>0 to <0.5 mass%), and Hf (>0 to <0.5 mass%).
The present invention provides a Co-free heat-resistant alloy for hearth metal members that exhibits properties equal to or superior to those of Co-containing heat-resistant steel. The heat-resistant alloy for hearth metal members according to the present invention is a heat-resistant alloy used for the hearth metal members of steel heating furnaces and contains, in mass%, C: 0.05%-0.5% and Si: more than 0% and not more than 0.95% where 0.05% = C + Si = 1.0%, Mn: more than 0% and not more than 1.0%, Ni: 40%-50%, Cr: 25%-35%, W: 1.0%-3.0%, and the remainder comprising at least 10% Fe and unavoidable impurities. The heat-resistant alloy for hearth metal members may also contain, in mass%, Ti: 0.05%-0.5% and/or Zr: 0.02%-1.0%.
Provided is a thermal decomposition pipe for olefin manufacture that can improve yields of olefin in thermal decomposition reactions of hydrocarbon raw materials. A thermal decomposition pipe for olefin manufacturer (1A) supports a dehydrogenation catalyst (4A) on the inside surface of base material (2), which is formed from heat resistant metal material and formed in a pipe shape.
A rapid stirring machine including: a tank 13 for stirring sludge and a flocculant; a drive shaft 16 disposed in the tank 13; and an edged turbine blade 17 attached to the drive shaft 16, the edged turbine blade 17 including turbine blades 20 that are disposed along a virtual circle centered around the axis of the drive shaft 16, on at least one of the front and back sides of the edged turbine blade 17 in the axial direction of the drive shaft 16, the turbine blades 20 being raised in the axial direction of the drive shaft 16.
The present invention provides a heat-resistant pipe having an alumina barrier layer whereby a decrease in mechanical characteristics such as creep rupture strength or tensile ductility can be prevented while an alumina barrier layer is satisfactorily formed on the inside surface of the pipe. The heat-resistant pipe pertaining to the present invention is used for hydrocarbon pyrolysis and has an alumina barrier layer including Al oxide on the inside surface of a pipe body, the Al content on the inside-diameter side of the pipe body being greater than the Al content on the outside-diameter side thereof. The Al content on the inside-diameter side of the pipe body is preferably at least twice the Al content on the outside-diameter side. The Al content on the inside-diameter side of the pipe body is preferably at least 1.3% greater in terms of mass% than the Al content on the outside-diameter side.
The present invention provides a cast product that can further enhance the stability of an alumina barrier layer and can exhibit further superior oxidation resistance, carburization resistance, nitriding resistance, corrosion resistance, and the like when used under a high-temperature atmosphere. The cast product according to the present invention is a cast product having an alumina barrier layer including an aluminum oxide on a surface of a matrix, and the aluminum oxide is (A1(1,)M0203, where M is at least one of Cr, Ni, Si, and Fe, and x satisfies a relationship 02.0 in an atomic % ratio.
C23C 30/00 - Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
C22C 19/05 - Alloys based on nickel or cobalt based on nickel with chromium
The present invention provides a casting product which has an alumina barrier layer having further improved stability, and can exhibit superior oxidation resistance, carburization resistance, nitridation resistance, corrosion resistance and the like when used under high-temperature atmospheres. The casting product according to the present invention is one having an alumina barrier layer which is formed on the surface of a base and contains an aluminum oxide, wherein the aluminum oxide is represented by the formula: (Al(1-x)M(x))2O3 wherein M represents at least one element selected from Cr, Ni, Si and Fe and 0 < x < 0.5. The casting product according to the present invention is also one having an alumina barrier layer which is formed on the surface of a base and contains an aluminum oxide, wherein the aluminum oxide contains at least one element selected from Cr, Ni, Si and Fe which is dissolved in the form of a solid solution, and wherein the content ratio, in at.%, of at least one element selected from Cr, Ni, Si and Fe which is dissolved together with Al in the form of a solid solution satisfies the formula: Al/(Cr+Ni+Si+Fe) = 2Ø
C22F 1/00 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
C22F 1/10 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
A non-cylindrical membrane casing watertightly houses a non-cylindical membrane element for filtering raw water. The membrane casing comprises a non- cylindrical casing main body, a lid body fitting an opening end of the casing main body and movable in an axial direction of the casing main body, a pressing mechanism pressing and holding the membrane element. The pressing mechanism comprises a supporting unit supported by the casing main body, a maintaining unit adjustably maintaining relative positions of the supporting unit and the lid body along the axial direction. The lid body is fitted to an opening end of the casing main body, a seal is disposed on an outer peripheral edge surface of the lid body to ensure watertightness with an inner peripheral face of the casing main body and the inner peripheral face of the casing main body is smooth at least in a moving range of the seal.
To provide a cast product having an alumina barrier layer and method for producing the same. A cast product having an alumina barrier layer of the present invention is a cast product in which an alumina barrier layer containing Al2O3 is formed on the surface of a cast body, and the cast body contains C: 0.3 mass% to 0.7 mass%, Si: 0.1 mass% to 1.5 mass%, Mn: 0.1 mass% to 3 mass%, Cr: 15 mass% to 40 mass%, Ni: 20 mass% to 55 mass%, Al: 2 mass% to 4 mass%, rare earth element: 0.005 mass% to 0.4 mass%, W: 0.5 mass% to 5 mass% and/or Mo: 0.1 mass% to 3 mass%, and 25 mass% or more of Fe in the remainder and an inevitable impurity, and 80 mass% or more of the rare earth element is La.
C23C 22/02 - Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using non-aqueous solutions
B22D 13/02 - Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
C22C 19/05 - Alloys based on nickel or cobalt based on nickel with chromium
C22C 30/00 - Alloys containing less than 50% by weight of each constituent
C22C 38/40 - Ferrous alloys, e.g. steel alloys containing chromium with nickel
C23C 30/00 - Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
A cast product for use in high temperature atmosphere comprising a cast body of a heat-resistant alloy comprising of, in mass percent, 0.05 to 0.7% of C, over 0% to up to 2.5% of Si, over 0% to up to 3.0% of Mn, 15 to 50% of Cr, 18 to 70% of Ni, 2 to 4% of Al, 0.005 to 0.4% of rare-earth elements, and 0.5 to 10% of W and/or 0.1 to 5% of Mo, the balance being Fe and inevitable impurities, and a barrier layer formed at a surface of the cast body to be brought into contact with said high temperature atmosphere, said barrier layer comprising an Al2O3 layer having a thickness of 0.5 µm or more wherein at least 80 area % of the outermost surface thereof is Al2O3, and said cast product having Cr-based particles dispersed at an interface between the Al2O3 layer and the cast body at a higher Cr concentration than that of a matrix of the alloy.
A noncrystalline composite alkali metal titanate composition which is chemically stable, outstanding in resistance to hygroscopicity and suited as base materials for friction materials. The said composition comprises at least 60 wt.% of an alkali metal titanate represented by the general formula M2O.cndot.nTiO2 wherein M is one or at least two alkali metal elements and n is a number of 1 to 4, and at least 10 wt.% of SiO2, M2O/SiO2 being equal to or less than 2.5. When desired, it is possible to incorporate into the composition an oxide of at least one element selected from the group consisting of B, Mg, Al, P, Ca and Zn, and/or an oxide of at least one element selected from the group consisting of V, Cr, Mn, Fe, Co, Ni, Cu, Y, Zr, Nb and Ba.
A thermal cracking tube is provided which is adapted to suppress pressure losses to the greatest possible extent while maintaining a heat transfer promoting effect on the fluid inside the tube. The tube passes a fluid therethrough from one end thereof toward the other end and has a plurality of rows of projections extending circumferentially along an inner surface of the tube orthogonal to or as inclined with respect to the axis of tube, each of the projection rows including a plurality of projections provided on the tube inner surface. The tube is defined by S/10.pi.D=0.2-0.7, h/D=0.02-0.05 and L/.pi.D=0.04-0.5 wherein D is the inside diameter of the tube, h is the height of an optional projection A included in a projection row .alpha., L is the length of circular arc of the projection A in a direction orthogonal to the tube axis, and S is the area of a region R surrounded by the projection A, phantom lines L1 and L2 extending respectively from circumferentially opposite ends of the projection A in parallel to the tube axis and a projection row .beta. downstream from the projection row .alpha..
F28F 1/40 - Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
There is provided a boom assembly bent at the center in a longitudinal direction so as to form a round shape protruding upward when seen from the side, comprising; a front boom sub assembly (47), the front boom sub assembly constituting the front of the center in the longitudinal direction of said boom assembly; and a rear boom sub assembly (48), the rear boom sub assembly constituting the rear of the center in the longitudinal direction of the boom assembly, wherein the front boom sub assembly (47) and the rear boom sub assembly (48) are symmetric when seen from the side, and portions from the midway positions in the longitudinal direction of the front boom sub assembly (47) and the rear boom sub assembly (48) to the center in the longitudinal direction of the boom assembly (12) have upper surfaces of arc shape protruding upward when seen from the side, and portions from the middles in the longitudinal direction of the front boom sub assembly (47) and the rear boom sub assembly (48) to ends in the longitudinal direction of the boom assembly (12) have upper surfaces of linear shape when seen from the side.
A loader control device for controlling a loader implement attached to a tractor is disposed in a position adjacent a driver's seat and does not obstruct the driver boarding or alighting from the tractor. For this purpose, the tractor includes a vehicle body; a loader implement detachably attached to a front part of the vehicle body; a driver's seat mounted on the vehicle body; a steering device disposed forwardly of the driver's seat; a step laid between the driver's seat and the steering device; rear wheel fenders at opposite lateral positions of the driver's seat; and a shifting unit disposed between the driver's seat and one of the rear wheel fenders; wherein a mounting unit for mounting a loader control device for controlling the loader implement is provided in a forward position of an upper surface of the one of the rear wheel fenders.
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