摘要:
A method for manufacturing a fused cast refractory article including the steps of pouring a molten refractory material into a cavity of a mold including a casting sand held by a negative pressure applied through the sand and against a thermoplastic film which surrounds the mold cavity, casting and cooling off the refractory material, wherein the negative pressure is maintained after the casting. The mold includes an upper mold portion including a frame, a casting sand, and a thermoplastic film; a bottom mold portion including a frame, a casting sand and a thermoplastic film; and a cavity defined by the thermoplastic film between the upper and bottom mold portion and having an inlet opening.
摘要:
In a refractory brick assembly for a heat regenerator, a plurality of brick units are assembled so as to form many long vertical gas flow passages. Each outer wall of the brick units has four corner portions each of which has a plurality of convex and concave strips. That can engage with each other so as to hold the brick units due to the friction between them. A high projection is formed on at least one of the inner and outer walls for producing a turbulent flow.
摘要:
In a heat regenerator, a unit body of a refractory unit has an upper end surface (1a), a lower end surface (1b), an outer wall (1c), an inner wall (1d) and a flow passage (7) which is formed by the inner wall (1c) and extends between both end surfaces (1a, 1b). The outer wall (1c) includes a series of concave and convex strips (4). The inner wall (1d) includes a series of concave and convex strips (5).
摘要:
An X-ray computer tomography apparatus includes an X-ray tube, a two-dimensional array type X-ray detector, a rotating mechanism, a pair of collimators, a collimator moving mechanism which separately moves the pair of collimators in a direction almost parallel to a rotation axis, a reconstruction processing unit which reconstructs image data in a reconstruction range, and a collimator control unit. The collimator control unit controls the position of each collimator in accordance with the distance between an X-ray central plane corresponding to a cone angle 0° and an end face of the reconstruction range. The collimator moving mechanism moves each of the pair of collimators in the range from the outermost position corresponding to the maximum cone angle to the innermost position offset from a position corresponding to a cone angle of nearly 0° to the opposite side.
摘要:
The angle of each collimator plate with respect to an X-ray focal point is determined by fitting the collimator plate in grooves formed in upper and lower supports each having an integral structure. In addition, the warpage of each collimator plate is corrected and its flatness is maintained by fitting the periphery of the collimator plate which is on the X-ray detector side in a corresponding groove of an abutment plate provided on the X-ray detection surface side of the upper and lower supports. Furthermore, each collimator plate is supported by the corresponding grooves of the upper and lower supports and the corresponding groove of the abutment plate at least three sides.
摘要:
A spring to ensure default opening is constituted by a single piano wire where a return spring with a larger coil diameter and a default spring with a smaller coil diameter are connected via a connection arm formed with a spring hook. The spring with a smaller coil diameter is inserted in the spring with a larger coil diameter thereby the springs are overlapped in an axial direction as a duplex-winding spring structure. Further, a magnetic sensor is provided in a position inside the both spring with a larger coil diameter and spring with a smaller coil diameter.
摘要:
A method for producing an activated carbon material, wherein the method comprises a step of thermally treating coal-based pitch at two temperature ranges of 400° C. to 600° C. and 600° C. to 900° C.; and a step of mixing the thus obtained carbonaceous material with an alkali metal compound and effecting activation thereof at 600° C. to 900° C., and an activated carbon material obtained by the method. When the activated carbon material of the present invention is used a polarizable electrode material of an electric double layer capacitor, high capacitance per electrode is attained without application of excessive voltage. By adding fibrous material to a coal-based pitch during activation expansion of an alkali molten liquid can be suppressed and productivity can be drastically improved. Furthermore, employment of an fibrous carbon material which is excellent in conductivity as a fibrous material, carbon fiber is melt-bonded on the surface of the activated carbon material, which enables production of a polarizable electrode exhibiting excellent charge/discharge characteristics at high current density.
摘要:
A throttle device for an internal-combustion engine, in which, on one surface of a throttle body side wall is formed a mounting space for mounting a reduction gear mechanism which transmits the power of a motor to a throttle valve shaft; and a throttle sensor for detecting the throttle valve opening is built inside of the gear cover covering the mounting space, and is covered with a sensor cover. A shaft hole of a rotor of the throttle sensor is exposed out through the sensor cover. When the gear cover is attached to the side wall of the throttle body, one end of the throttle valve shaft fits in the rotor shaft hole by elastically deforming a fitting spring inserted in the shaft hole, thereby enabling downsizing, weight reduction, and simplification of assembly and wiring harness of the electronically controlled throttle device, and realization of stabilized operation and improved accuracy of the throttle sensor.
摘要:
A throttle device for an internal-combustion engine, in which, on one surface of a throttle body side wall is formed a mounting space for mounting a reduction gear mechanism which transmits the power of a motor to a throttle valve shaft; and a throttle sensor for detecting the throttle valve opening is built inside of the gear cover covering the mounting space, and is covered with a sensor cover. A shaft hole of a rotor of the throttle sensor is exposed out through the sensor cover. When the gear cover is attached to the side wall of the throttle body, one end of the throttle valve shaft fits in the rotor shaft hole by elastically deforming a fitting spring inserted in the shaft hole, thereby enabling downsizing, weight reduction, and simplification of assembly and wiring harness of the electronically controlled throttle device, and realization of stabilized operation and improved accuracy of the throttle sensor.
摘要:
Provided herein is a non-contact type rotational position sensor which is allowed to achieve intensification of parts, miniaturization, simplification of assembly, and higher accuracy. A rotor (a permanent magnet) is mounted on a rotational shaft. A Hall IC is interposed between an upper stator and a lower stator which are magnetic plates. The Hall IC is sensitive to magnetic flux density which varies according to a rotational position of the rotor. In a housing incorporating the rotor and the Hall IC is provided integrally a connector provided with an external connection terminal. Conductors for connecting external connection terminals and input/output terminals of the Hall IC are embedded into the housing by insert-molding. One ends of conductors are exposed at a fixed position where the input/output terminals are present. The terminals of the Hall IC are guided by a guide and joined to the one ends of conductors.